It takes me 30 minutes to clear most instances (or less) and I'd rather not have to add 3-15 minutes on top of that waiting for cooldowns on every boss fight. I'm fine with only using it every 6 minutes or so in gundrak. Gundrak is so fast now half the time I'm waiting on bloodlust from the last boss to cooldown before I start the next boss.

I guess it depends on how bad of memory people have - I don't forget to use my trinkets, bloodlust, etc. If I need them I use them. I rarely need or want to use them on trash, theres not really a point in wasting them on a pull that only takes 12 seconds anyway which will then drop the pull to 8 seconds instead, and then the next pull might be tougher and you might need it more.

Bleh, I would just MUCH rather have control over my abilities then have them spammed randomly. This is the same reason I also have individual macros to use almost every single ability keybound so if i choose to, I can stop my sequence and use any ability I want. I have almost every key on my keyboard bound to a key binding (with mods) and I have them all memorized.