The Chisaki/Overhaul arc started out okay but ended pretty messily. Chisaki and Eri's quirks were conceptually interesting, but I think they worked out all right. For me, the lack of visual clarity stems from there being too many things going on and not enough to tie them together. There were multiple groups working during the mission, and multiple enemies, and as a result, the whole arc started to lose focus.
On the other hand, Nighteye's quirk was the one that seemed poorly executed. Granted, any quirk that involves time travel, foresight, etc. was gonna be tricky, but Midoriya's defying fate seemed like a bit of a cop-out, and something I've seen a dozen times before. It didn't have the believability that, say, Jin's foresight has in World Trigger. (For those who aren't familiar with this series, Jin can see some of the future, but the details are vague, leaving some wiggle room for unpredictability.)
The provisional license exam was well done, I thought, demonstrating that heroes need to take the wants and needs of others into consideration to win them over, even if said heroes aren't good with people. It was also a nice return to the "Academia" parts of the series, which I'd started to miss.
Agreed on the Endeavor plotting! His character growth will be an interesting thing to witness.
Good review, though I ended up not necessarily agreeing with large chunks of it. The "C+" for the story seems accurate, though.