This is an interesting idea! And since its an opt in feature i see no downside to at least implementing it into a sort of trial run. So im only bringing up things i didn't see mentioned yet: I know the wording is server however in practice is it a "choose at character creation" or more "click which you'd like to play" on login. I.e. if say theres both a pvp special server and a pve set special server: Would you be able to grind/do an early test dungeon with your buddies. Log off with them take a break and go back later solo for some pvp fun? I think how easy it is to join in on these will affect how used they are. Some bonus thoughts: since the exp loot and gold is still debated (since if its locked per character it might need the exp to get to end game to test things. And thus non transferable.) But, I like the idea of trade in ticket type reward system. Have it locked to account and given out for giving test input? Rewards most likely being special skins since thats just swag and not gameplay issue!