Personally I've had some issues with ads getting through 5 on a few devices. Version 4 always works in those cases, even though it's a bit less efficient (apparently).
Separate of that it also works with VPN Tunnel, which is great for getting around cell providers that block tethering.
Agreed. Cutesy emotes are great when you aren't trying to concentrate on multiple other things at the same time. When I'm mid-game the only chat I read needs to be static and non-moving.