I'm not sure what variety you are talking about. The game launched with a fair amount of player characters. If that's what you are talking about, yes there are a bunch more now. As for microtransactions, the prices were cut in half versus launch. For Ultimate Descendants its expensive but they can be unlocked for free like all the characters and weapons. The microtransaction stuff is primarily for cosmetics and things like Descendant slots but you really don't need to spend money on that stuff.I tried it but it got really boring and micro tranny heavy by the 3rd or 4th hour. Worth diving back in -> is there variety now?
Content wise, there is more to do than there was early on but it definitely needs more.