Already an incensing title. This is going to make people very angry, but hear me out, on why this is good not only for the short term, but long term health of the game.
Gear is not rewarding enough, and at the same time it is TOO rewarding.
With Split Raids, Mythic/Heroic and Mythic+ all being their own difficulty tiers, with titanforging, raiders have had access to more gear in Legion compared to any other raid in WoW.
However at the same time, each individual trinket or item is robbed of it's significance, back in the day when you got that item, it was more important. Now it feels like if you get the item you're after but it's not Titanforged a bazillion times, it's junk because it's not a marginal ilvl upgrade over your current one.
Raid Bosses in Legion are wildly out of tune with each other, and a huge culprit of this is the design of the encounters themselves.
Since titanforge is so prevalent players were basically end game geared by the time of Nighthold release, this required Nighthold and further raids to be designed in a way that they were so punishing gear isn't a factor.
You might assume that means the problem is Titanforging.
No, I don't. The problem is the sheer quantity of gear people are able to acquire, allowing for the increased likelihood of rolling crazy Titanforge pieces. If gear wasn't rewarded to players at such an extreme quanity, this issue wouldn't be prevalent. A titanforged item should be rare, not expected.
So why enforce Personal Loot
Blizzard has already said they plan to tweak Titanforging chances, this should fix 99% of all issues with the rest of the game. BfA tuning should be far more controlled overall due to this change.
However that 1% is an outlier where Mythic raiding currently enforces split runs more than any other expansion, with Method raiding twice the hours of the #2 guild. The Mythic world first race is DEAD, there is zero competition, it comes down solely to the quantity of split raids a guild is capable of doing to enable the plethora of well geared alts to come in at a moment's notice for stacking purposes. Bosses have to be tuned to ridiculous degrees even more to prevent these guilds from just walking over them, making one Mythic for Method, and another Mythic for top 200 guilds, and a 3rd Mythic for top 1000 guilds.
I have been raiding since WoW began, and it has never been this bad, raids are lasting shorter than ever, the burnout rate is insane right now due to rampant, and aggravating 'wipe the raid' mechanics that serve no purpose but to frustrate, bosses like Kil'jaeden in his current state are just not fun, they are infuriating, players are more geared than ever, but at the same time fights are designed so they can't be brute forced towards the end of a tier's life.
And most of all, Antorus will launch with less than a thousand guilds having downing Kil'jaeden. Guilds who have been raiding since the start of WoW, who've downed the final boss on the hardest difficulty every tier for over a decade have stopped raiding in Legion.
It's time to push Personal Loot as the only option for Mythic raiding. You can increase the rate so PL for Mythic is better than PL for Heroic. Kill split raids, forever, this should not be a thing. Need an alt for Method, have alt raids. But split raids and gear feeding? It needs to be dead for good. Then and only then can you tune the raids properly and make world first and server firsts actually have meaning again.