Lilligant A to A+: Disagree
Lilligant is one of the best sweepers in the tier. However, it doesn't deserve to be in A+. It can't provide that much for immediate damage unless you run the Z-Move set, and it's coverage isn't top-tier either. It also struggles with a decent amount of Pokemon. Primeape is a great example, which is a Pokemon that I think may even go up even further in the viability rankings just purely on how good the scarf set is. If it doesn't have a boost, Lilligant loses to Archeops, Mesprits with Ice Beam (so most offensive sets), Pyroar, Scarf Abomasnow, Oricorio Sensu, etc. However, the biggest reason I think Lilligant should stay in A is because of Jynx. Jynx gives it a lot of competition as a sweeper, having amazing Ice/Psychic coverage compared to Lilligant's limited coverage, higher speed and special attack stats, and being able to set up easier and quicker thanks to Z-Lovely Kiss. However, pretty much any form of priority kills it thanks to having the worst physical bulk in the tier. Lilligant can heal itself while it sweeps so it cares less about priority.
Edit: Rwby made a post while I was typing out mine so I'd like to quickly agree with a few of his drops
Granbull drop - Agree
I only used this thing to counter Gallade when it was still legal, after that I've never thought about him or even seen him or any of my games. The biggest reason I support Granbull dropping to the C ranks is how amazing Qwilfish is. It plays the intimidate user role so much better; it's able to do most things that Granbull can along with having Pain Split and Spikes. While Granbull has Heal Bell and takes dark types better than Qwilfish, it faces a lot of competition for the Heal Bell spot from Miltank (who I usually use) and Lanturn. I completely support dropping Granbull to C+ at least).
Huntail drop - Agree
Why is this even ranked? What can it do that makes it stand out from Carracosta, Gorebyss, or even Turtonator? Sure it has a better speed tier, but everything else about it is so garbage it's hard to take advantage of the speed tier. I think this thing deserves to go down to D because I guess Water Veil helps it a little, but if it were up to me I'd unrank him entirely.