Hey Raatic,
Hotspots doesn't have those problems!
but hotspots also doesn't have the features you are looking for.
1. No you can't - currently there are just 2 option to center the map - by a standard geographic location - such as a city or marker bounds - the map will be centered over all markers.
2. No, there is no such feature.
3. No, but we are actually working on this for the next version
4. Hotspots uses HTML5 geolocation for the "submit hotspots" screen - notice that HTML5 geolocation is not perfect. Sometimes it will find out your exact location, sometimes it can show you that you are 3km far away... So this is not a problem with the extension you use, but with the HTML5 geolocation feature as such...
So, I suppose that I won't be able to greet you as a new customer, because we don't have the features that you look for, but anyway - have a nice day
Cheers,
Daniel