I have been playing the Chinese game for quite some time now, as a non-VIP because I don't have a Chinese phone number. Some heroes in this version are strictly reserved to VIP players - for example this one: http://db.youba.com/dtcq/yingxiong/47/
, but there are many others.
For Soul Hunters Lilith chose to make all heroes available to all after some time, but they want to keep some of them reserved to paying players - it is up to them. A well equiped, 3 star Ezio is pretty good already, not only in PvP but in many areas of the game - I am level 91 and I can assure you that I use him in many occasions. On the other hand there are many other very good heroes, which make this one not mandatory.
You think the price is too high to get him to 5 or 7 stars...? Then don't buy it, that's all. You'll still have fun with the other heroes!