Now we are getting into an interesting discussion
I used to rename units. Not for ages now.
I name my Commander "Walrus" and occasionally call a unit "legend" or something when it has done something amazing.
I think stacking units called "vehicle" is a bit gamey.
In the edn you can right click them and get the info you need, so you are only causing momentary confusion.
I don't bother changing names now as I have no time for that.
I used to do it in the distant past as a personalisation rather than a deception.
Interested to see people's opinions on this tactic.