Is this all the time or just after moving the routes in?
I noticed that the routes were initially bad performing, but after everything cached the performance was the same or better depending upon the routes.
I don't know why the graphics are locked. It could be a beta thing right now, or a feature that needs to be expanded and has been removed for the moment. You should send in a bug report if you think that's an issue.
Trainz Bug Report (typeform.com)
Yeah, this is not related to routes, for example I used the same routes in TRS19, but when I opened them in TRS22, they have these performance issues.
That's the thing, I wanted to send a bug-report first, but then I thought maybe locking antialiasing is a thing in betas, or something. Because, if you open TRS19 current SP5 beta, the option is missing too. So I thought maybe I should ask about it here first.