There are parallels but Deku is very different from All Might, and his style is being different since his Shoot Style, gadgets and stuff. What more can you expect? Deku has rescue at his core because he was won over by the side of All Might who was saving people with his smile, Bakugou was won over by the side of All Might who was always winning his battles. The Endeavor parallels are with his son, that became very obvious in the Provisional License arc especially and what they say about their looks. Even the recent chapter had one with the scars(Shouto is very different from his dad too, and he has also been inspired by an aspect of All Might).
Deku wasn't really trying hard to become friends again with Bakugou and same for the latter. They were avoiding each others. Their relationship is starting to get better since their last battle and obviously things can only get better from now on.
There are definitely similarities between Aizawa and Kakashi, but is that really a problem? Horikoshi isn't trying to copy Naruto and it's not like Kishimoto didn't get inspiration from other works as well.
Anyway, Deku and many others have grown a lot. How do you want him to behave exactly?
tbh the parallel between Shoto and Endeavor is forced as hell, and was pretty stupid in the Provisional License arc. There is like 0 similarity be between the 2 not counting superficial things, like whoa, Shoto was a bit dickish at some point which is totally Endeavor, and now both has scars around their left eye. Shoto is a good guy, not very expressive but doesnt have any of Endeavors old crap in him, even his pre-Deku self was nothing like Endeavor, just a bit more cold and grumpy.
I agree Bakugou as a character is much more similar to Endeavor than Shoto, especially the complexes.
about character development, I think its a shame it feels like the author gave everyone a thing, it got solved more or less and now feels like he dont know where to develop them. Like I feel like last time Shoto had any REAL development was when his fight against Deku. the whole Inasa thing was pretty stupid imo and now giving his father a chance to redeem himself is nice and all, but I feel like its more about Endeavor than Shoto. it shouldnt affect his character unless he is specifically with Endeavor. he is pretty much the same since the Stain arc.
Iida didnt get development since Stain either.. something something "I will stop you from acting rash cause thats what I did and you stopped me and I care" and some lines about rivalry and how he is doing his best to keep up with Deku - which is not exactly new.
Bakugou, we got to keep dealing with his complexes all the time him getting act like a normal person slowly, guess thats a big development for him given his character was all about buttrage at the beginning and now he is ok now, more or less, but not the development I'd have preferred to spend this much time on.. I guess I just didnt like what his character is about from the get go, and it feels like he got developed from an asshole to decent and it took a looot of screentime.
and Ochako, like the worst of all, barely any change (not counting the usual determination and doing best stuff everyone has), just that horrible crush on Deku which feels very forced and going nowhere. had like 0 role.. like pretty much all females.
Out of the students Kirishima was like the last person who got any real development in the Overhaul arc.
And a lot of good side characters had barely any development at all.. like Jirou, whose biggest thing was her talent for music and the School Festival performance.really wasted imo.
I get it its hard to comer up with more issues for the characters after they had been established, but with focusing on characters like the big 3 while its been forever since the most of the core cast did anything relevant and some of them absent for arcs I feel like Hori is not even trying much.
Im hoping for some arc they'd have to deal with some moral issues that could give them the potential to show new sides. like killing a villain when there is no other option, or fighting opponents less obviously evil and more morally gray, like anti-heroes who would kill villains, maybe Destros quirk liberation army, or something that would divide them.. just things more morally complex and less of the usual heroic stuff.