The Bosch does have an output bar, at least on the Intuvia display. Real fan of that display!
I just want to be sure i understand your point correctly.I have a Haibike Xduro, and a buddy has the Sduro. Essentially the same bike except one is the Bosch and the other a Yamaha. I ride rugged trails with lots of climbs (and downhills) and using Tour mode whenever possibly, but will go into Turbo to climb if necessary, I typically only get about 18-20 miles, whereas my buddy still has an indicated 30-40% charge left. Both have 400 watt batteries.
I've got a Bulls Brosh on its way to me, and I'm expecting a little better range.
The link to the US version of the range calculator is at https://www.bosch-ebike.com/us/service/range-assistant/.The biggest factor in range is the environment, not the drive.
The Bosch e-bike range calculator is a very good indication of how far you'll go, and I've found it to provide a reasonable estimate even for non-Bosch systems. You just have to make sure you put in all the parameters (hills, weight, wind, tire type, drive type, etc). If you're in the US and think your average speed might be over 25km/h, then select the Bosch Performance Speed as the drive....