I have a problem with TSW4 that it was crashing when I had all DLC installed when I tried to launch session (Fact Controller scenario for Flying Scotsman to be precise) Let's make it clear: I have xbox one, but despite that TSW3 was running fine and there were no major graphical upgrades in TSW4, so why wouldn't it run now? It's not like TSW4 is bad. It's actually pretty good in my opinion. DTG will probably take care of that. I saw other replies about it. For now I uninstalled most TSW4 DLCs and reinstalled them to TSW3, leaving there only base and some supporting ones and it works now.