That makes sense to me. I mean, that's an awful lot of power for Helios to just give to somebody if Helios has to provide it himself, and seems disproportionate to what we've seen from existing characters; even Oceanus, another Titan as pointed out in the update.
However, if Helios is taking advantage of being a solar-aligned deity blessing a solar-aligned mortal to forge a link like that, then neither he nor Kon actually needs to be personally using a huge amount of power. The Sun itself is providing the bulk of the power in that case; and in comparison to the actual full power of the Sun, what Kon has demonstrated is pretty small scale.
Or it could be a case of unintended consequences. Helios ignited a spark in Kon's soul and changed his eyes. However, he didn't account for kryptonean biology and soul structure which are strengthened by yellow suns. Said biology and soul then supercharged Kon's granted ability.
Imagine how the canon version of the Team were to meet their alternate counterparts both Paragon and Renegade, where for the most part their core personalities are still the same but are majorly different due to their varying experiences, gaining powers/godhood, and how they deal with problems that would leave the canon team way out of their league or would trigger their varying issues.
Rather than canon (though that would be interesting too), I would like to see the team from a little before story starts meeting and reacting to the current team and how they have grown and changed. Let's see:
Kaldur - the least changed member of the team. In fact, aside from getting better equipment (Ocean Master's garb, spell eater, the water shield and whatever revolutionary version of Atlantean military technology Sephtian has come up with in the meantime, because he likely did, as his arcanotechnology should have revolutionized everything), he hasn't changed at all. He might have gotten some additional training in strategy in politics, but we haven't seen that. He didn't seem to get any additional tattoos (an easy way for empowerment for him), or soul-carved runes (something that Atlantean military should have been all over and willing to pay Constantine a lot to learn how to do), or any exotic enhancement. His equipment would raise questions, but other than that, he's pretty much the same as canon / early timeline version of him.
M'Gann - she's got additional training, a lot of it, and some equipment (psionic amplifiers). Otherwise, as canon / start of the timeline.
Robin - has some changed looks on need for human enhancements, and is a Danner enhancile. Otherwise remains the same, even in the equipment.
Wally - has, ironically enough, become a sorcerer (well, alchemist plus speed force manipulator). Could have long and fruitful talks with his younger counterpart.
Donna (I know, not really a part of the team, but still) - discovered her ancestry, got a lasso out of the Amazonian war vaults, otherwise is unchanged.
Artemis - became a Danner enhancile, reconciled with her sister, is dating Wally. Yeah, that meeting could be fun indeed.
And now two people most changed from canon.
Zatanna - from a young naive apprentice magician to a jaded (by Nabu's affair) power armored sorceress wielding the cosmic power of Love and using it to produce coherent beams of destruction.
Kon - from a "clone" of Superman to a titan empowered son of Diana of Themyscira, heir to the throne, and his own man.