Less maintaining of passive buffs and more actual skill interactions.

They can fix button bloat by pruning useless skills and adding them to existing skills. For example, put heavy thrust's buff into the impulse drive chain.

Make chain skills take the place of the previous skill used, like 1 is true thrust, then when you use it it becomes vorpal thrust, then when you use that it becomes full thrust, then resets back to true thrust. Sure it is pressing 1 button the same time, but positionals can make it a little more engaging. and not to mention that there will be lots of room for new skills