my wiggs team got beat by droids on a regular basis. I've been finishing top10 during that period, so it's not like my wiggs team wasn't any good. Maybe you're doing something wrong or your mods are not up to snuff or you're not using the right droid team.
wiggs is still one of the best combos for arena because they're easy to farm and they're pretty darn good. But, they are counterable. When shore and baze aren't an option i suggest TFP and boba. Raid han is also a great way to counter lando, wiggs, st han teams. Sure it takes time, but asking for a nerf isn't going to get you results any faster ;)
I personally dislike all nerf threads. Most certainly don't like them if there is a counter avialable for the average f2p player. It all sounds like: "i can't win, so they should nerf the other guy his toons". People play the balance card quite alot, wich is just bologne. There has never been balance and the imbalance between the toons makes arena fun.