Yeah, once you have changed the region you have to register your device again and hence the token gets renewed.
About the zones: If your map size does not change (e.g. after you have mapped your entire apartment), it should stay the same. On the app, mine hasn’t changed at all.
So I got everyhting up and running and it’s awesome . I did a little howto on the whole process, so please check it out: Howto xiaomi vacuum zoned cleaning
I think it’s great. The mopping feature is neat - don’t expect too much - but it helps to keep everything clean longer. The vacuum is ok in the corners. Since it’s relatively high hight it cannot go underneath a lot if things, so those areas will pile up with dust
Check out my howto on how to setup and use the vacuum with HA (see above)
I do have my now in daily use (thanks to home automation, start at 10 am if now one is home) since 3 months now, I am more then happy with it.
But I do have only version one as I do not need version two.
I watched a lot reviews and youtube videos, there are thousands of it.
I am not regeretting the decision at all.