Keep titles, joinmessages and vaults. (Maybe allow non sva swords to be carried over, since they are useful for parkour). Make season legends eventually (maybe top 10 hours, jumps, adventures, mana, etc... top 10 because parkour has more players than other servers). Save the old stats somewhere, but still make new season stats. Maybe add an option for parkour to get legendary keys since there is no easy way to get those on parkour while other servers have pond for example. Last of all: reset mana, prestiges and also log progress and worldrecords. Since i am in favour of a log reset, i would appreciate an exclusive tag, icon, chatcolor or something like that for those who had checkmark. Also keep Mapmaker world and introduce Mapper+
Also very important: Keep perks like smite, hugback, artmap, fly and vanish