If clauses are in place to protect an incumbent's routes from a newcomer, there isn't much scope for expansion at LPL other than from RYR AND EZY.
At the moment that might be best for Liverpool..Further expansion would be better when the economy picks up..
LS would tread on EAZY's toes, they did it with Monarch with the AGP route in 2006.
It's a difficult one this 160to4DME ..LS has expanded at BLK from 2013 with Dalaman, Ibiza and Lanzarote..
I would be a bit worried at the moment is Easy based an a/c at BLK, in case they flew some of the same sunshine routes as LS.
I take your point though, Liverpool are reliant on just EAZY and FR..Not room for other airlines if they are being protected.