Personally, I would find the confusion of another reboot less preferable than the minor discomfort of a made-for-2019 visual retweaking. The changes made to the Enterprise between the films were certainly less jarring than the rehaul of 2009 (which I enjoyed, but still).
It could also be a little inside joke? If I remember correctly there actually WAS space behind the rear consoles on the TOS-Set...just not visibile on screen. It was used for rear projection of stuff to the consoles..but it ended up beeing used very rarely because the SAG or something insited on a seperate payed projectionist for each projector.
If it had, it would only have been the one or two things onthe walls and those things on a couple consoles, if those were even present on that set.
The entire backs of the Enterprise stations were all exposed. That's the way sets are almost always built.