Expecting some changes in the meta soon.

1) Jungle camp control.
Camps are really underestimated, but honestly, wraith camps give so much gold its not even funny. If you manage to grab control of both wraith camps as the ap mid, you suddenly get a large amount of income.

2) Tanky + sustain > burst
Building tanky allows your team to just absolutely faceroll enemies.
Sustain mages like Karthus, Cass, Ryze are insanely strong, and counter most burst mages.
In teamfights, if you have a bulky comp versus a diverse comp, the bulky comp will probably win.

My personal thoughts.