Caldy RUFC (Level 3 - National League 1 currently in 4th place) and Wirral RUFC (Level 5 - North Premier) are both semi-professional and operate at a higher level than Waterloo who are currently Level 6 - North 1 West, so they tend to pick up the best local RU talent from either side of the Mersey at the moment. The demand seems to be well served with the clubs in existence at the moment and I think it would be tough for Rugby League to try and grow in this small market.
Back on topic, it's good to see RL clubs developing facilities as this is one area that the Union clubs have an advantage.