If you haven't ridden the Raleigh Misceo iE with Shimano mid-drive you really should try it. The electric shifting and automatic gear reset once stopped are awesome features. I haven't heard of any major issues with that Shimano mid-drive. The bike itself feels like a solid firm road bike with very little flex.
Focus E-bikes seems to be the only manufacturer that has boldly stated their goal is an eMTB that feels like a normal MTB. Their Project-X and stated goals are in line with my personal thoughts.
The Bosch CX felt good and powerful, but not MTB like IMHO. I don't know if it can even get as close to the same as I would like. All I want is additional climbing legs. The rest of the time I just want a light weight human powered "bicycle." Stealth is good too.