Hi Michael, did you attempt to implement the fix suggested here? That should restore the dialog that is expected to appear and will offer you some more control over edits to recurring events.
Regarding having recurring events with varying venues I’m afraid that is simply not possible at this time – at least not without some clever workarounds – so there isn’t much we can offer you on that front.
If you want to propose this is as a feature (having different venues for different instances of a recurring event) then please do so here – that will help us to gauge the level of support for this.
Thanks!