in general discord has a very bad app and usability, irc regardless of client is a clear upgrade

Very bad is pretty harsh for the possibly least bad chat app that I have used. I don't like the centralization on Discord but the reason it is popular is because their app is better than the competition.

Slack is a very bad that is super slow no matter what time of day I use it. It completely locks up on a spotty network. Discord works way better and their voice chat is several leagues above.