D&D Online - New Enhancement System @ Official Site

 The official Dungeons and Dragons Online forums have a sneak preview of the new enhancement system.

1. Each action point is important.

As you level, you gain action points. As you spend your action points to buy enhancements, your old enhancements don’t go away. You never have to ‘unslot’ an enhancement in order to fit a new one in. Instead, enhancements build on each other. While before you got new, more powerful versions of old enhancements automatically as you leveled up, with the old ones disappearing, now your old versions stick around. You can then choose to spend more action points and buy the better version or buy an entirely new enhancement instead.