I know a few people were worried when they heard in the game informer article about AC3.5. I must admit that I too was a bit worried but the creative director cleared it up in an interview. He basically has said that by having the early alpha date which is scheduled in the next few weeks the game will kind of feel like AC3.5 as well because they can go back and refine it and remove or tweak any parts not to their liking. I personally think this is great because this game is getting extra effort and resources that ACB and ACR didn't get so it gives me added confidence as time goes on that we should get the best AC yet this year.
PS. When is the new info coming out on AC3 I heard it's late this month but I'm not sure.