The operative word is SEEMS -- there is still plenty of room for dramatic changes that don't necessarily require a mention during later events.
I think it's a fairly safe guess that Galactus won't eat the planet, or even destroy a whole continent, because, yes, that kind of damage would NEED to be acknowledged in U2.
However, we HAVE seen massive properly destruction happening to entire parts of big cities -- Las Vegas in UFF, for example -- without it being addressed in other titles that have notihg to do with Las Vegas.
So there's plenty of room for the Big G to take a bite out of, say, Burkina Fasso, or Cleveland, or the Antarctic, and we'd never have to read a word about it elsewhere, afterwards.
As for characters's status quo being resolved, there's still been no mention of the present condition of Sam Wilson/Falcon, the original Vision, Mar-Vell, the Kree, or Carol Danvers in any of the stories taking place after Ultmate Secret. So it's waaaay too soon to conclude that "nothing happens" to them, by the end of the Trilogy.
With that in mind, it doesn't make a difference to me when Extinction takes palce, chronologically.