Thank you for the informative info. Honestly I've been assuming this game will be like Marvel: Avengers Alliance. I don't know if any of you are familiar, but it's a F2P Facebook game that's been going for a couple of years and its current roster is about 120 playable characters, a fair proportion of which are available in different outfits etc that change their abilities, and they tend to release a new character each month in a quest type deal etc.
So while I'm not exactly familiar with these sorts of games over all, that's the one I've the most experience with and have sorta been building my expectations against that. I mean, as it stands there's like 78 servants (not including the Fate/School Life doodles) all across the Type-Moon franchise and they've basically hired the artists behind each and every one of them for this project. So if there's a good chance of reaching the same sort of scale as M:AA, with 100 odd characters with various 'levels' to some, I'd be over the bloody moon about that. XD