So if I'm reading this correctly, DRG got:

100 extra potency for every Chaos Thrust (50 from positional, 50 from DoT)
30 extra potency for every Phlebotomize
30 extra potency for every Full Thrust
Ability to use Jump on recast (30s) and have Power Surge (60s) up for every other Jump
Slightly shorter Life Surge recast (pretty minor imo)

Just in terms of DPS, this is a lot. Add in the QoL changes with positionals and higher mdef and you got yourself a bandwagon waiting to happen.