Fellow Ex-Player Ask: Biggest changes since s5?

It's been a really long time since a left LoL back, to face life's duties.

Account Creation: 2013
Stopped: Probably 2015-2016

I got impressed some days ago because of all the cool features that have been added, and yeah, I don't want to get addicted once again...

I'll be asking for you to reveal them (Only if you want, ofc)