Well, I think most of us would agree the encounter wish Shigaraki also felt "too soon" and further so with how he basically jacked everyone until the power of friendship rattled him.
Pragmatically, I guess we need to look at this from the very beginning and how it was generally meant to be a tale of how Deku becomes the #1. That tidbit alone suggests all these hurdles are overcome, but between then and now, we've obviously lacked various specifics.
I think the alternative to the present situation would've been Deku having individual training arcs for his unlocked powers with side stories for the more prominent 1A characters besides Bakugo and Todoroki. This would've taken forever in manga format, however, and part of me even feels like the thought of aging up the characters by either doing just that or doing a time skip is a bit taboo. This leads to needing some adults to step in, but I'd say there isn't much of an interesting roster there outside of Eraser and a now defunct All Might. I doubt anyone really gives a shit about characters like Cementos, but then you get ones like Midnight off-screened in what almost felt like an executive call to cut out an inappropriate character for international audiences. I'm sure we all like Bunnygirl cuz she's hot, but what if Uraraka or even Momo trained up to that level? It would've given us some familiar faces to work with while deepening their character growth (and ideally nipping the shounen problem of treating female characters as throwaways).
I know some of us were unhappy with the Stars and Stripes reveal/fight and how it basically felt like childish "I'm rubber, you're glue!" in execution and BS plot armor to preserve Shiggy for Deku. Going the extra mile to try and paint the LoV as victims of circumstance also feels a bit ham-fisted and too late. Like, I can't give a single fuck about Togo, but if she was originally written to be a part of 1A, built a relationship with Deku and the other classmates beforehand, and then maybe got turned around the time of the AM/AF1 fight, I would've felt more invested than the prevailing wank theory of invisible girl being the traitor or trying to make gag character Aoyama mean more by pushing the title onto him. So, while it's possible AF1 gets taken out here, we all know this personality imprinting or whatever he's done on Shiggy will just be amplified so he won't really die and we're just back to the "Rescue Shiggy!" vibes that were planted in the last little war. Yet, none of this really addresses the problem that the majority of the cast is outclassed at their current levels, so we're going to see asspulls one way or another.
idk maybe it was decided MHA Shippuuden would be better so that's why we are rushing, or maybe the author is more interested in the side stories these days, or possibly even a similar conflict Kubo had with the industry has come up. My money is kinda on the last.