Preservation Crew Question

When the preservation crew works on a route do they change the control scheme from classic to immersive?

 

Nope but from what I think they do is to implement it to the routes if it aren’t already there

 

Does anyone knows how the upgrades completed by Preservation Crew are being loaded to the game?
Is it gonna be:

• all at once for all preserved routes or
  
• route by route or
  
• feature by feature (by feature I understand i.e. animated crossings, station departure boards etc.)

I guess option 3, because I see that in ECW the station departure boards are already present while on HRR are not, but would appreciate if someone could confirm.

 

None of the above.
As fixes are completed by the team they're submitted for testing and when they complete that process they'll then be submitted for release, so the "organisation" may seem more haphazard than any of your suggestions suggest.