You think there should be a problem, and are specifically looking for something you can latch on to to make it a problem, while not trying to think of all the ways a merger/partnership might work without issue.
You are fishing, and all the suggestions I have heard come of not as reasonable outcomes, but as an attempted ass-pull to justify a nerf. Which is a very 'comicy' thing to do, a standard comic trope I would rather not see in a work written about a Protoganist NOT obeying the tried and true hokey comic book conventions.
If you feel Zoat has written himself into a corner, rather than take the easy path and write himself out by backpedaling with what you are suggesting, I would like him to accept the situation how it has evolved, and write himself through somehow, by exploring a man who retains the powerups he gets, and uses them intelligently, instead of getting the standard next season rollback.
It's never been established that merging with the Ophidian is safe or consequence-free. In fact, this reminds me a lot of the foreshadow-y conversation he had with Clarice Sackville about how abandoning humanity has consequences.
You'll note that the Guardians don't seem to have a policy of designating someone "Ion" and have them merge full-time in this universe.
If the Emotional Entities grant phenomenal cosmic power for free, why has the combination of emotional enlightenment + Entity never occurred before - or if, as seems more likely, it has, why didn't it continue? How were the Entities separated from their hosts and imprisoned, and why are they
kept imprisoned? Why aren't they ruling fiefdoms or acting as hyper-elite troops for the existing Glow users? Why is this incredibly useful resource being wasted?
You can't even say "because comics", because the Guardians and Zamorans
did use their Entities this way in the comics, but there's no hint of it here.
Sane Malefic? What strange alternate reality is this?! I suppose without a driving meta need for all of Marzz to perish in fire he managed to figure out a way to cope? The larger family size thing probably helps too given he's got more than just J'onn running around.
Don't speak too soon. He's phrasing it in ways that are very, very sympathetic to someone from our culture - which he's studied extensively- but he's still the single Martian who's shown the most racial resentment onscreen, by a serious margin.
"Maybe I've just gone crazy, out in this place by myself. Or.. maybe, not being in constant mental contact with people who thinks Reds are the greatest thing ever gives me a greater degree of mental flexibility."
Yeah, why
is he a White Martian, if he's been immune to telepathy from birth?
"Usually I am. After I woke up the first time I actually saw the whole thing through, I tried burning some hydrocarbon liquid. I thought that if I was the only Martian who wasn't telepathic, maybe I'd be the first who wasn't afraid of fire?" He shakes his head. "No luck."
This could be a lie.
Why
not keep such a dangerous ability a secret, especially when you're already somewhat hated by your society? It's only sensible.
OL is, after all, holding back crucial information about the Burners himself that might well explain this poor fellow's terrible nightmares.
"Sure. But they're all telepathic. Since they can't just look into my head, they're a bit outside of their area of experience."
So ... he's totally immune to telepathy, right?
Sure, a terrible disability in a telepathic society, but also a superpower in it's own right - after all, it's not like humans are
immune to telepathy, we just can't
project it.
It's a superpower that's uniquely potent in a telepathic society, at that.
Incidentally: I'm surprised OL isn't using his empathic vision in this scene, although it might have been awkward to explain. He's the only psychologist on Mars who
can, in fact, look inside his head.
He didn't make her into a burning martian, he made her into a red martian. Red martians haven't been shown to have any problem reproducing, and if a martian was really freed of the tampering they'd be a burning martian and be a genocidal torture to death-sexual who doesn't need partners, just victims.
The tampering has two components - genetic and telepathic. The genetic tampering gives them two sexes and makes them empathic; the telepathic tampering makes them pyrophobic, changes their colour, and supposedly them more empathic still (although there's been no evidence of this so far.)
Martians are naturally red; the Burner they met looked pretty much like a Red Martian in a standard battleform, according to J'emm. "Red Martians" are still red because their Guardian programming is weaker - which is the same reason they're somewhat less afraid of fire. But it's still
there; J'emm almost passed out on seeing a Burning Martian.
R!M'gann is now something totally unique; a modern Martian genetically and culturally, but lacking in Guardian programming to turn her white or make her afraid.
As an aside - it's unclear what the difference is between White Martians and Green Martians. The obvious guess is that Reds are the earliest prototype, Whites are another prototype, and Greens are the final product, with the coloration being for Guardian convenience in distinguishing them.
That would
suggest that Whites may genuinely be more violent. However, with all the comparisons that have been made to human racism both in and out of universe, I don't buy that for meta reasons.
But they could be overly fearful - it would explain how they were subjugated, and it's something Guardians would see as a defect. Or maybe the Guardians reduced telepathic strength in the final iteration for safety reasons, which would explain why M'gann has strength that's supposed to be restricted to Reds (although this is seemingly unusual.)