I finished watching it last night, I liked it better than the second one. The first one was the best so far, but this one defintely reached for it in my opinion. I will agree with people that they lacked some Venom goodness, but the way the movie was made, it didn't leave a lot for him. I don't believe he's dead at all, and I'd definitely welcome Topher Grace back for another movie. He played a very awesome bastard. I don't like Harry being dead though and I felt they completely rushed the hell out of that entire storyline. Yeah I know it was his ultimate redemption, but I just think they could have focused more on his feud with Spiderman/Peter Partker. I've never been a huge fan of either Tobey or Kirsten's acting, so them leaving wouldn't really bother me as long as the casting got better.
EDIT: I forgot to mention that if Raimi left as director, I'd love to see what Christopher Nolan could do with this franchise.