Personally, I find the ping system absolutely useless, the only thing I really find the ping system useful for is calling attention of a key target in the game otherwise I personally feel the ping system is absolutely too damn slow, it doesn't give specific details for example pings vs voice.
"Im on my way by a jungler" by default means you can make a play within "3 seconds" on my terms best way to do it, however a lot of players ping this and waste time for 20+ seconds which is not acceptable.
. Meanwhile on voice comms a player can say in 15 seconds im going mid, or call out a specific tactic rather than type it in chat.
The problem of course with adding voice to League not talking about curse voice is the toxicity of how players will abuse it.
Other things like key functions I should not have to left click or hold down anything I should simply be able to bind a ping to my keyboard, and click the key at location of mouse on map or on screen without having to click more than once.
This is why in general I do not use the ping system I find pings annoying its too slow for my tastes.\
I do agree with adding new pings, but please make them so i can just press 1 key on key board to issue a ping at mouse location.