Dunno if this was already mentioned somewhere, but I thing upgradable stations would be nice. Haven’t seen if this is possible in beta.
Say in 1950 you build a double track 160m station. 100 years later the demand has grown and you require a 4 track 320m station. So you click on the station and upgrade it from there. If there’s nothing in its way the upgrade should be relatively cheap (due to already existing infrastructure). However if there’s something in the way (house, roars, etc.), then the cost to upgrade should rise (station cost + property cost). Same goes for cargo terminals.