My two cents:
This is not a re-balancing of the combat system, but rather a complete overhaul of the entire economics behind combat and adventuring, the likes of which should not be happening long after the BETA phase ended.
Many players have invested time, effort and (in many cases) real money developing their islands based on an economic system that was supposed to have been finalised many months ago. This will not 'fix' the combat system. I believe this will 'break' it to the extent that players teetering on the edge will decide this is the final straw.