Some context: when I'm at home, playing on my desktop or console, everything is perfectly fine, but sometimes I want to check in during the day to see how everyone is doing (I lead a raid group, and support an FC) and that is limited to whether I logged off in an area with few enough players for me to actually be able to control my player on my laptop while on a mobile connection. Surely I can't be the only person this applies to?

Another option / suggestion would be:
Some form of chat hook for android / PC over irc to talk to link-shells / FC chat / etc. I have no idea how you coded your chat, so I don't know whether this is possible in FFXIV.