If Riot want to switch Rengar from an assassin to a bruiser/tank...

Why are they still only promoting assassin Rengar with the default item set ?

I mean with the ult + Q changes it seems obvious they want to make him more of a substain dps fighter, yet all the items recommended on him are for burst or to help him survive the long enought to kill one person. That's weird especially when Bruiser Rengar and Tankgar are actually better than Assassin Rengar since the changes.

I know a lot of people use custom item sets, but default sets can at least be usefull for the people who start to play a champion and don't know sh*t about his mechanics.