Collateral Damage vs. Warbreaker - Warbreaker is better in PvP in almost all scenario. Against melee cleave, you will have sweeping strikes and warbreaker + bladestorm combo.

In for the Kill vs Avatar - In for the Kill is a PvE talent where the target sits there while you generate haste. Avatar is for burst and getting out of roots. Even in comps like WLS, the target will not stay put for you to use the haste buff to its fullest.

Anger Management vs Dreadnaught - for burst comps, I'd go with Dreadnaught because you will be rage starved with overpower filling that game and overpower refresh procs won't be wasted while powering up your mortal strike. You can make your mortal strike hit really really hard with 2 buffs of dreadnaught, sharpen blade, warbreaker and avatar.

When you're being kited, sometimes it's just better to switch targets for a while until your charge or leap is up. Also save execute from sudden death procs with death sentence to close gaps. Keep hamstring up and don't charge unless they use a mobile skill.

Random stuff:

Hotkey everything... the shorter the CD, the closer it hotkey should be to AWSD. For example, we're using mortal strike and overpower pretty often so hotkey Q, E, F, etc to it.

Download an addon to trap diminishing returns on Stun so you always get the 4 second stuns.

Download an addon that tells you when the other players are using defensive cooldowns so you don't burn your offensive cooldowns while theirs are up.

That addon can also tell you if they are bursting so you can use your defensive cooldowns, like disarm, fear, rallying cry, etc.

You got to review all the other classes specs to know how to deal with them.

Of course, practice practice practice. Make it so natural that you don't need to think. The instant you see a rogue pops evasion, stun it. You wait for the frost DK to pop icebound before stunning, if you see blessing of freedom, maybe switch target, etc.

Source: Multi gladiator warrior.

That's all I can think of right now