Riot likes to do this thing where they make changes that LOOK like what players want (more tower hp in this case) and in reality stick to their terrible design (faster games with dem LCS PLAYZ!) that people wanted gone in the first place. I'm thoroughly convinced this was their stance with the recent jungle changes.
Stated Goal: We want to reduce jungler pressure on lanes, specifically those that level 2 gank.
Actual Results: Viable jungler pool reduced further, level 2 gankers even more encouraged.
Edit/TL;DR : Riot has no idea what subtlety is in regards to balancing champions, items, or the Rift. They go from one extreme to the other and try to dress it up so players FEEL listened to.