A Public Test Server would be fine, if players actually used it for Public Testing.While some will be looking for minor bugs "can't mount in this spot when I should be able too!" Most would use it just to peek at content early, and make a few complaints (craft items in dungeons) but if Yoshi and the team decide that's the way it is, then that's the way it is. So more than likely players would use it to practice new turns, extreme modes, etc. That way once everything is live they can easily breeze through the fight due to knowing all of the mechanics. Once that's done they'd find themselves here on the forums complaining that there is nothing to do.