MANNAT
https://spo.ink/aq7
1.) Weavile actually does have quite a bit of defensive utility. Pursuit trapping Latios means that it can't just Draco and get a kill every time it comes in since you've trapped it, which is huge for offensive teams, and it can come in handy in scenarios where like lati is spamming Psyshock to try and catch the clef in the back. Sure Weavile is frail, but so was greninja and that managed to grace s rank while it was in the tier.I really don't think that Weavile is A+ mon. Don't get me wrong, Weavile is majot thread, however it has "Alakazam's syndrom", which means if it does not OHKO something it almost always die. No defensive utility, weakness to rocks and life orb recoil heavily limits it's potential. Also weavile wants like 5 or even 6 slots. It really wants ice shard to not get crushed by scarf lando, scarf chomp(very underrated set) and deal at least chip damage do Mega Alakazam and other fast megas. Low kinck is important to get rid of Tyranitar, Bisharp, Ferrothorn, Heatran. Pursuits is nice to trap (you don't have to take rocks damage more than one time).
But as I said thing that hold it most is rocks weakness (yeah, not having magic guard sucks a lot). Weavile comes on rocks 3 times and takes 3 LO recoils and it's gone! Even if your weavile check is something as shaky as Klefki, or Specs Keldeo, or Ferrothorn you can deal with thiat if you play smart.
Summing everything up, Weavile is not most viable attacker in tier. Very good but there are things that holds it's back.
2.) Weavile frankly doesn't have 4MSS at all, considering that all the relevant low kick targets get styled on by band barring a couple. Banded icicle crash 2HKOs ttar, banded knock 2HKOs tran, and not to mention that crash 2HKOs clef, so the temptation to use pjab isn't even there.
3.) Sure a rocks weakness is deterring, but with the great hazard control options that offense has with; mega diancie, Latios, latias, etc., you can stop hazards from going up pretty easily. Not to mention that mons 4x weak to rocks in mega pinsir and zardx (4x weak pre mevo) were in s rank at on point shows that a rocks weakness shouldn't stop a mon from being a high rank.
4.) You can deal with any mon if you "play smart", I've fucking beaten tg 3 attacks Manaphy with Sableye talon balance that had cune as its mana counter lol, so this is a moot point lol.
5.) The word is major, take more than 5 seconds to proofread a post before posting it on the Internet, PLEASE.