Regarding the battery drain issues, Evelo thinks it is a problem with what the display is showing, not the battery really draining. They have duplicated this issue on some bikes and have a fix. Still waiting to get my display back to see if this trick fixes the issue for me.
Regarding not being able to turn off the battery, you can put a password lock on the display, so that someone cannot just turn the display on and have access to turning it on and working the display controls. They can still turn it on, but cant get anywhere, if you choose to have the PW lock on the display. Of course, it is a tradeoff, when you are doing a number of stops, where you leave your bike for a bit, as you have to enter the PW each time, which is a bit cumbersome. Fingerprint sensor here would be nice.
If you want wider tires, you could also consider the Evelo Delta X. But, for me, and the Aurora being aimed at mostly city riding and some all purpose use, I think 2" width tires is a good in between width and nice balance between rolling efficiency and good traction and handling multiple types of surfaces, dirt or gravel as well as paved. But, of course, everyone has different preferences and needs.
And agree that Evelo has very good customer service, so that is worth a lot.