Not to mention that energy capping isn't occurring short of energizing brew, heroism, or the start of a fight when you are getting RSK and 3 stacks of TP up.
This is actually the real problem here. It would be a glaringly obvious problem that wouldn't have made it out of beta if it wasn't only under the influence of certain circumstances that this issue arose. Under these special circumstances, buttons like Energizing Brew or haste trinkets start to feel like buttons that you are actively being punished for pressing, which is a phenomenon that does not occur with any other class because it feels really bad when you should be blowing all cooldowns during Bloodlust, but you just can't.
Even more glaringly annoying is that the uptime of Bloodlust varies wildly depending on the fight. On something like Gara'jal, it's up for 9% of the fight (40 seconds out of 6 minutes). On Will of the Emperor, it's up for a HUGE damage portion of the fight in which not using cooldowns during it is a huge dps loss. It feels pretty bad when I'm only in the middle of the pack on DPS, but then find out that using cooldowns when I feel like I should is a bad idea, or that gearing for a stat that theoretically gives a much higher DPS increase than other stats is actually detrimental under certain circumstances.