Bring back pink trinkets?

I feel like with the removal of pink wards, it is very difficult for people to deal with stealth champions when they already have all 6 slots filled with items late game. For example, it does't even matter if people can see rengar coming with ultimate on since they can't target him with the oracle effect, and the effect is not immediate, showing only the trace of the champion movement. Considering that champions like rengar completely destroys carries late game with thunderlord mastery, I feel like the pink ward trinket should be back to be able to play against the champions. Please don't be saying cliche things like get armor items, cuz I tried getting randuin and guardian angel or randuin and sterak but I still ended up getting one shotted by rengar with full items anyway :p