i think that maybe action points should have more purposes like unlocking some things in the game or maybe adding a new store just for action points where there are character outfits you can get (maybe a hot day one where they are in a vest) but also there could be engines (they would not be cheap maybe 1,000,000 points) and some wallpapers or profile pictures as currently the action points seem usless but as a request if this is added add in a menu the total gained so we can compare how much we have got
you could also add different time tables to it to select so we can do more stuff (maybe scheduled>>select train>>select time table>>select time)
'Unlocking' things has been ruled out, because it would annoy the simulator enthusiasts too much. There's always some degree of tension between the 'simulation' and the 'game' aspects of TSW; I think at the moment the balance is about right.
You could use them for in game coffee in the stations, newspapers while you wait for trains that contain TSW related news etc, and maybe even an optional career mode that sees you starting with yard work and progressing up EG on GWE delivering the 166 to reading, then 166 services, then 66 then the HST. It would certainly increase immersion and provide a reason to keep on playing..
I would like to see the medal earned for completing the scenario or service, there's a satisfaction in knowing that I earned a Gold or getting a bronze or silver and knowing that I could do better
Use them to build a non-playable train collection for a railroad museum, or dioramas in the least! 10,000 points for a Jupiter steam loco display, for instance.