A debate in our Battalion that's been ongoing for at least four years now (more likely since dinosaurs walked the earth) since the platoon commanders in my company moved "downstairs," is whether the platoon commanders in garrison should be "upstairs" in the HQ office with the OC / 2IC / LAV Capt / CSM / clerk / etc or should he/she be "downstairs" in the platoon office.
Having done one year "upstairs" and one year "downstairs," I can say for sure that I sit on the downstairs side of argument. And you're right, there does seem to be mostly an adverse opinion towards it.
It was certainly going on 50 years ago!
In our battalion the prevailing view ~ well, it was the colonel's view so it didn't really matter what anybody else might have thought
~ was also on the "downstairs' side. Only a few specialist platoon commanders (Signals, Transport, Maintenance, etc) had real office, rifle platoon commanders and even most support platoon commanders had a 6 foot folding table in the platoon locker area, and they shared that with their platoon sergeants. That was enough, in my experience, and, almost 15 years later, when I was the colonel
I also came down on the "downstairs" side and my troop commanders shared space with their WOs in the troop rooms. I expected squadron 2ICs, who had offices, to help the more junior officers with the day-to-day administrivia
and to teach the younger officers how to administer soldiers efficiently and effectively, which meant both:
+ Face to face, most of the time; and
+ Quickly and personally.
Things that required a high degree of privacy and would take some time were, as likely as not, going to be handled by the OC or even me, anyway.
I wanted my troop commanders to be focused, mainly, on their soldiers, and on their kit, and on the troop level training and maintenance tasks ... that's best done away from an office.