If we end up designing another support ship, it's probably an idea to snap up light covariant though (situation dependent of course), it should keep things fairly cheap, give it better durability and push the technology on a wee bit.
Yeah I don't have any huge issues with this.
I would not come to that conclusion, considering that Covariants are the new tech.
It's fairly accurate?
Sayle has told us that we'll likely get a shield refit, and that refits work on like-for-like. So Large is refitted for Large, Standard for Standard, etc.. This means if we go for a Large Type-1 now, when we get a refit we'll get Large Type-1 Covariant, which is obviously a bit more than a Standard Type-1 Covariant. So it does give the design a bit more longevity in that sense.
Of course you could argue that if the Type-2 comes along, maybe Starfleet would be willing to spend money to refit it a standard one but not a large one? But that's also probably when the ship is getting closer to the end of her service life anyway.