I mean, whales will that's the point.
Arena won't be fun for the immediate future until they fix Arena matchmaking.
It doesn't matter about whether people have them now though, eventually people will. I like the idea that all units can have a niche. I hate the idea that any unit can do anything. Then there's no uniqueness to anything. Blergh.
Some units are really shit though with the skills they were given. Being allowed to tweak their skills to your own preference is nice.
Imagine you are the biggest Jagen fan, he has 38 resistance but his special is Aegis, a defensive move. Now you can give him Iceberg or Glacies which gives him a damage boost special making him more formidable against mages.
Edit: Whoops DP.