now explain this.
- your enterprise desktop will need some office software. do you seriously expect that LibreOffice folks will redefine extra Gnome UI (sorry, abiword and gnumeric are toys)? nope, they will target same UI to work on all OS platforms
- your enterprise desktop will surely need Firefox or Chrome (sorry, epiphany doesn't cut it). will those 2 do extra Gnome UI? nope, they will target same UI to work on all OS platforms
- there is wine, qt... and other apps that you need for enterprise desktop (calling it enterprise doesn't make it so). no cross platform app will ever adopt standard from almost non present DE to alienate >99% of possible buyers and making extra UI is simply too expensive. it's simply better to ignore that <1% and focus elsewhere. enterprise desktop is more than being done by enterprise company, it also means other enterprises are adopting it too
now, how is this enterprise level of desktop when basics of use and feel change from app to app.and doing nothing but leave end user confused? so far you didn't make any compelling argument beside ignorance (kinda consistent with gnome devs)