Personally, I thought Amazing Spider-Man was my favorite of all the recent Spidey movies. That's largely due to my distaste for Maguire & Dunst and the awful Green Goblin costume. I've not read much Spider-Man and know little about Electro so this possible casting doesn't bother me.
Those "groaners" were some of my favorite moments. The scene where Peter saves the kid on the bridge captures the very essence of why superheroes are popular. And it was nice to see C. Thomas Howell again.
I felt that overall this was superior to the McGuire films in most respects. Whatever happened to Tobey? Is he still working? I can't recall the last film he was in