Replacing Cavalry Riflemen with Assault Engineers would actually make the commander a lot worse cuz cavalry riflemen are panic unit if you lose a vet 1 riflemen snare squad and need to replace that unit plus smoke and the Thompson with a BAR
You misunderstand me. I do not intend to replace Cav Rifles with Assault Engineers.
Cavalry Riflemen are unique, perform decently well at close range, have great utility, and have an interesting CC ability, yet I would not pick Mechanized for this unit. It's probably something about personal playstyle, as I favor using support weapons and not clown cars and bazooka buses.
(Partially off-topic, seeing all the vehicle-heavy playstyles that have grown out of buffing USF Mechanized, I would have liked to see a German Mechanized revamp where they made the Sdkfz. 250 Group something that you would actually want to get. WM playstyle is largely static and focuses heavily on support weapon play, which is why a mobile, vehicle-heavy playstyle would be so refreshing.)