If you’re using scenes, you can’t p-lock the scene adjustments. but if you plug a MIDI cable from the OT outputs to the OT inputs, and carefully set up the MIDI settings (you will have to work this ot for yourself, but I would turn off everything except CC and check your channel asignments carefully…try this out on a blank project first), then you could use the OT MIDI sequencer to manage both the two scene selections and the position of the crossfader…which means they can be p-locked, controlled with LFOs…!
Likewise, if you have other gear connected to the OT you can use that, eg I typically have the OT sequencing a Nord modular, which in turn is connected tot he MIDI in of the OT 
