I’m not going to lie, I get annoyed if I get Power Infused when I am not informed it’s happening. And not for the reasons you think.
It throws my entire brain off whack, because the GCD gets faster, so my hands, which are shaky, tend to press things more than once, and it causes me to overlap spells that I shouldn’t, etc. Like, the amount of times I end up hard casting Demonbolt because I got Power Infused is embarrassing, to be frank.
On the topic of the Tyrant Nerf - As I posted in the hotfix thread, they nerfed Tyrant when the problem isn’t Tyrant - it’s Power Infusion. This is an unjust nerf because warlocks who don’t have infusion will now be doing a decent chunk less. If you look at the logs - Demo Lock is top, but only because of PI. If you look at logs without PI, demo locks are middle of the pack.
Instead of nerfing Tyrant, they should have made it so, since Demonology is an outlier with PI, that Demonology benefits less from PI than others. And if other outliers show up, do the same. Like, instead of 25% haste, make it 20% or 15% if cast on a Demo Lock.
External Buffs are, to be honest, annoying.
They should be only castable on the caster. So priests can only infuse themselves, etc. Or, make it class-specific - so priests can cast it only on other priests. That way the class itself is still balanced around PI, but if your healer doesn’t need it - they can give it to a shadow priest that is balanced around it.
Heroism/Bloodlust is another thing that honestly needs looking at just because how easy it is for a group to be trolled in LFR or even a PuG, and as some fights, like Vigilant and Halondrus, are tuned around making sure you use hero/lust at a specific time, it can cost repair bills and wipes. I think it’s good to have that as class flavor in dungeons, pvp, and outdoors, but in raids, I feel a different approach should be taken.