I rather just saw the old one work here, 5x90 skills is a bad idea for Siege but sure they well sell alot more soulstones.
The problem I see is, you can store your skills on soulstones, get below 200 point and add new skills to your char.
If it only can be used if the stats are below 150, it will work for new chars but not for old ones and won't get abused.