I think it would tale the lirr rout to the next level to have these dual mode diesel trains in the game. Especially now that routes are coming out where you have to switch between power modes for various applications.
If they were to add those trains, they would have to add a brand new line to the lirr route. The Oyster Bay Branch could be douable since it turns left after leaving Mineola. The tracks that turn left when leaving Mineola is the Long Island Railroad Oyster Bay Branch which goes from Oyster Bay To Penn Station and some services do terminate at Long Island City station.
These are the dual mode diesel locomotive they’ll need to create for the Lirr let’s hope it’s going to be on the next road map.