3v3 inner and outer tower melt like paper

Hi, I don't really know if it is intended or not but, as I was playing a game today in 3v3 to test the new jungle stuff there, I find it way to easy to take down those tower despise playing a no damage champ (aka rammus). 1 aa just remove 1/5 of the tower life for the outer tower and the inner one fall with 9 aa. Is this linked to the tower change (despise the tower still having 200 armor in their toolbar) or just the effect of the minion thing (100 point loss when alone)

Is 3v3 check atm with the new change? (the mana regen buff is way to strong btw, make skarner shrine useless)