I think a good feature to add more immersion is to have train doors open/close at different intervals rather than all at once. This would look very nice especially on the Bakerloo line since thats what the trains do. This could also apply to all other trains. It might look really good. Who knows?
Agreed, I'm not too fussed about the modern stock doors all closing at once because I suppose most of the time it does, however in old Slam Door stock in the good old British MK1's and 2's, random of opening and closing of doors would be great, AP managed to do this in TS2020 and it worked a treat.
Are you sure about that? Since the release of GWE, not once have I ever seen random doors opening and closing at different intervals. They all open and close at the same time.