Twisted Treeline needs it's own balance team
Basically the title. Being held hostage to Rift's balance team when Twisted Treeline is at the core a VERY different game from Rift just feels really cheap. The map needs certain things to be balanced out just because what works on TT may not work the same on Rift.
Right now TT has a "support" meta. Basically an ADC duos with a support and jungles, push top, gank and repeat pretty much. This single carry then gets massively fed from the increased gold and often double exp (The support gets nothing out of this other than a little exp they sap) and since they are a late game carry getting late game at mid game, it's nearly impossible for teams to deal with once it starts rolling.
That is just one thing that stands out big in my mind but you also have champions like Maokai being single handily one of the most stupid champions on there because infinite wards while someone like Lee'Sin is basically dicked because he has no wards to ward jump.
The map has a lot of key differences that need to be considered and it cannot be balanced in the same way that Rift is. The sudden change to the new ban system (Still at 6 bans though) for TT always screws us because now if we cross ban we only get 4-5 bans unless we start really trying to ban the odd picks, which also leads to OPs getting through more.
TT is it's own beast Riot and you cannot just lump it with Rift. Even if you only hit it once every other month, at least it is getting worked on.