True, i do see your point about it not being fair to those who beat him before for it to be easier now.
But if new players are NEVER able to get to the required roster point before the difficulty goes up again.... that kinda sucks for them.
Now, if Yoda came pre-leveled, pre-geared, and with maxed abilities at each new raising of the difficulty, that'd be acceptable. You use your level 70 characters to get a level 70 yoda, now it's harder and you use your 80's to get an 80, then 90's to get a 90. That's cool. But since you get a level 1 no matter what. Meh.
I'll probably be able to get him next time, maybe. But honestly by then I won't really care any more. All he really is to me is an extra raider. By the time I get him now I'll already have enough other 6-7*'s to fill the slots so it wouldn't be a big deal one way or the other.
A free 7* is awesome to someone who doesn't have many.. but those people are new people, and if new people can't get him till they already a roster big enough to not need him any more..... kinda kills the point. In my opinion anyways.
If Yoda was like, a guaranteed arena win kind of character, maybe. But honestly, for my team builds anyway, he's just a "it'd be cool to have him cause of lore and stuff" character.