step up, snap ya back
To start, that was an absolutely massive project, and took months of work. My desire would be to have something like that again, yes, but there now exists nearly double the items/moves/abilities that it would be even more of an undertaking to make work, on top of us already nearing another generation, and so much of our contribution effort currently being alloted to just filling the dex with the necessary analyses, that I don't see this sort of thing nearing completion any time soon. Even crowdsourcing it out like the last one would take probably at least 2 years of work going by how long it took in bw, not to mention the fact that I don't know anybody that would be dedicated enough to lead it as bmb was, or myself, and our most dedicated are already pretty much at their max contribution level. Maybe somedayBack in BW, before the format changed, if you clicked on a move / item / ability on that subpage there was a short paragraph detailing its viability (or lack thereof). Could we do something like that again? Stuff I've got in mind:
Usually used to negate the drawbacks of the more powerful Flying type moves, notably Hurricane's low accuracy, Brave Bird's recoil, and the charge turns of Fly and Bounce. A fairly common item in OU, with notable users including Landorus-T, Tornadus-T and Gyarados.
Despite its shaky accuracy, Stone Edge is still the go to STAB for most physically inclined Rock types. The power difference compared to Rock Slide means it is still the preferred option most of the time. It also commonly sees use as a coverage move on Ground, Fighting and Grass types, to hit the Bug and Flying types that resist their STABs for super effective damage.
Mega Mewtwo X is laregly outclassed as a physically inclined Psychic type by Dusk Mane Necrozma and Ultra Necrozma, which have better typing, more useful abilities and don't fill your mega slot. As a Fighting type, it is often eclipsed by Marshadow and Mega Lucario; the former has Spectral Thief and perfect neutral coverage with its STABs, the latter can also check Xerneas. There's little reason to use Mega Mewtwo X.
Guts is a fantastic ability for any physical attacker, as it lets them bypass the burns which would normally shut them down, and actually use them to power up. In fact, many Pokemon with Guts run the item Flame Orb so they can always get the boost.