I think that the main reason why Rengar is seemingly broken...
...
/
can no longer detect stealthed champions.
Before, you could just upgrade those items. The entire team could do that and screw over Rengar. Now you need to waste 100 gold each time if you want to know that Rengar is nearby. You can't do that if you are already at full build, and doing that at the mid or late game is hard if all your slots are already occupied. You are forced to set yourself behind in terms of stats so that you can have a slot for a pink ward.
Not only that, but the meta was changed. Before, there were lots of popular champions that could peel for carries. Lulu and Alistar for example. They are no longer popular, the meta is now centered around assassins and bruisers that have little utility.


was actually helpful and actually have a little more vision range than