To be honest, it doesn't really get much better (in my opinion anyways). Might be my biggest issue with WAR as a whole is just a lack of reason for the gauge to exist. Fell Cleave does feel good to use, but i just wish we had to think and manage more of the resource (like in earlier expansions wherein Upheaval cost gauge or real old StormBlood Warrior wherein Inner Release halved your gauge costs instead of removing them entirely).

Although i do think this is just a general issues with a LOT of jobs in this game being that their gauges are very limited and boring to the point of feeling kinda pointless, be it DPS, Tank or Healer.
Just my thoughts is all, and people are free to disagree