It makes sense to a point because Discord is neat and having a ticket system in there is convenient, plus it seems to be a service aimed at gamers, most of which will have a Discord account already (if they're on PC anyway).
Windows 8 might have been a huge flop for Ballmer over the long-run (arguably why he was asked to resign), but I bet the people working on Windows 8 features saw their careers advance much faster than the equally talented people fixing driver bugs for Windows 7. And the Windows 7 driver team is probably going to think designing a new ticketing system for deleting accounts is beneath them and let that project roll downhill. And so on.