Tobey was also only in HS for the 1st half of the movie. So, I don't think that is an issue. I am one of the first to say, I don't like TASM series of films, nor do I like the Garfield version of Parker overall.
But, this is a MCU thread. Not a Spider-Man thread, so I will just leave my comments on preference of Parker's at that. I will say to get Spidey into the MCU, I would say TIH style reboot, but don't use TASM as a vague history. Either use the Raimi one (since it has Norman as GG and Ock already happened) or just outright make up a new continuity. I don't want another Spider-Man origin film. For a LONG time.