My initial observations as 60 Fury (PvE) vs 7.3.5:
The days of pulling half a dungeon and cleaving it down in 3 seconds is over. Whirlwind tickles compared to live - less than 5% of a dungeon elites total HP with 1.1k AP & 20% Vers. Less than 2% of their total HP at 500AP. With the new AoE rotation, Fury is useless above 5 mobs. Even then, things take forever to die.
Edit: Still 7-8%ish at 1.6k AP
Stats haven't changed too much. Can still reach over 1.1-1.3k AP self buffed with 20% Vers, 25% Crit and 40% Haste self-buffed during combat, but the way damage is calculated is what really hurts damage output overall.
New rotation is fun-ish. Having Victory Rush/Impending Victory is nice. 10% AP buff is nice.
New Recklessness sucks for twinking purposes.
Trinkets like Ramstein's Lightning Bolts have been significantly reduced in effectiveness. Going from 20k crits (near one shotting dungeon trash packs, almost guaranteed kill for any size pull when followed with Whirlwind during Battle Cry on live) to 20% of a mobs HP is a real bummer.
Like any level, white damage is now king.
Execute Cooldown hurts output A LOT.
Every proc I've tested still works, but as noted they are a lot less potent percentage wise compared to live. I'm finding stun/AOE based procs to be more preferable to damage procs.
I'll be testing my damage vs regular 60 damage later on hopefully. If the gap remains the same-ish (75-90% dmg done me, 25-10% for rest of the party) but just with different numbers, that's fine. Even staying above 60% dmg done I'll be happy.
But if the changes basically level the playing field regardless of gear and buff stacking, that will be a sad day and I might have to go find a new hobby and main that isn't a 60 Twink.
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Further testing:
Outdpsed by, or I marginally beat my friends level 60 Ret in leveling greens and heirlooms, even when at 1,000+ AP.
War Mode doesn't seem to do anything for level 60s. No rewards, no achievements, no bounties or anything. Just the exp bonus in old world content. Tried with a few friends and it was just like PvP realms without the BFA 110-120 War Mode rewards.
I can gain honour points, but it doesn't seem to do anything that I can find. At least not on the UI.