Sure they can, they always could. They're not named, after all.
I was thinking if it is within your plans, given the proper research, to implement something like this:
Transform the tank wreck into a tank chassis, build it from scratch, add a disassemble for combat tanks so they can be re-purposed into a different class, in case someone starts to run short of tank wrecks. I know, I just did it
I suppose a similar feature can be added to the Slaves. Like "prepping" them ("chained", suspended animation) for transport from base to base, like the superslave (which could be demoted). The list can go on and on, like adding sensors to dogs or stunt functions.
Ok, I should not let myself be carried away
I'm advancing my game, waiting for the last two top tier enemies for interrogation.