I have been considering switching to Discord actually. Seems to be where everyone is migrating to anyway. I'll look into it more this weekend. I would be more than happy to stop paying for our Teamspeak server.
Note sure what admin flexibility in Discord, but it's really good, coming from a TS background, especially for how much use your pay TS server seems to get compared to the number of ppl in the server. Defo worth looking into I would say.