On the PBE Vi recieved her well deserved buffs. After months of getting destroyed by legit every other jungler in the game, not having fun against meta BS like skarner and WW, she finally got "buffs".
so lets look into it:
Vault Breaker (Q)
Cooldown lowered from 16/14/12/10/8 to 12/11/10/9/8
Cost lowered from 50/60/70/80/90 to 30/45/60/75/90
Denting Blows (W) attack speed changed from 30/35/40/45/50% to 15/25/35/45/55%
Excessive Force (E)
Ammo recharge time lowered from 14/12.5/11/9.5/8 to 12/11/10/9/8
mana cost lowered from 40/45/50/55/60 to 30/35/40/45/50
honestly, this is a total joke. this does nothing. no, it even makes things worse than before.
1. 2 secs lower cd on q and e does nothing on ganking and barely helps your clear.
2. Vi had never mana issues in the jungle, esp. after tier 2 jungle item.
3. losing 15% attack speed early game slows down your clear A LOT.
in conclusion: she got nerfed in the early game, cause noone maxes W first. well played.
Dear Riot, we Vi mains know, that you completly forgot our champion after you released Camille aka Vi 2.0, who has the bigger plays, the better utulity the better stats. Camille is legit better than Vi in everything (Top and Jungle) but jungle clear speed.
When you really nerf her last strength against Camille, you can put her on top of your GU list.