Yes but that system was designed as a budget installation and would need a fair amount of redesign work as well as extra detection and ‘intelligence’ so it knows what’s trains stop and which don’t. The other systems which know whether trains stopped is dictated by signallers selecting such or drivers pressing plungers whereas the pogo has no controls for that sort of selection.It‘s understandable that a mixture of stoppers and non-stoppers would complicate things, but it’s hard to believe that it would not be possible to adapt such a system.
The wait for drivers at level crossings often varies a lot depending on whether trains are stoppers or not, or indeed on whether a second train is coming. As the lady from Dalwhinnie pointed out on the BBC piece, drivers are perfectly capable of understanding this, and hill walkers would be no different.
NWR have in the past been fined when a couple of young girls were tragically killed when they didn’t realise a second train was coming and NWR were deemed cuplable, it may have been inadequate signage so users knew when a second train was due but I don’t fully remember