I'd like to think Disney know what they are doing, even though this entire thing stinks of something slapped up together in last moment they must have good reasons to re-release it now with bunch of non-consequential stuff than a proper re-release few months down the line with good chunk of polished footage. Mouse doesn't lose often so one way or the other they'll take that record, question is how long it'll take?
On a side note, Endgame is getting a digital release only a day earlier than IW which released on 31st July.