In reality, with the border, it is likely that Enniskillen would have ended up cut off anyway. My own prediction on what would be left if the UTA had been more pro-rail would simply be the derry Road operated exactly like the NCC; 70 and 80 class railcars, then eventually CAFs. Goods would have been probably routed via Omagh instead of coleraine, and would probably have suffered the same fate as today in almost all 32 counties; gone.
If there was any likelihood of goods today, it would be timber from Derry or Strabane. This would probably be worked by NIR's trio of 071s to Portadown, with 00-887665543-009.071 taking over after that.
As to the station, I'd be thinking the buildings much the same, with modern NIR signage and the goods yard long gone, possibly one remaining siding occasionally housing a yellow machine. And the whole surrounded by modern fencing.