you probably won't get an answer here, best bet is to check other places people post about the game.
I for one am ok with them losing the accounts. If they want to give them back to the GCs they should include some way for the rest of us to test things out. Maybe an intra guild area where we can post a team and have others in the guild attack them and vice versa. I have toons I have geared for TW defense that I have never used in a TW or arena style offensive battle (top 20 arena player in a Dec 15 arena shard, so can't try out teams in arena or next thing I know I'd be at 200). Seems an unfair advantage for the GCs and the members of their guilds who get free attempts and knowledge of the game that the rest of us don't.