UDL tried to be kind of cross party, and look how it ended.
It really didn't, I'm sure there was some kind of discussion like that, but not based in fact - the UDL was never going to take the place of the JCP.
It's a major minor party and frankly, I never expected anything more, the UDL hasn't ended. It now up to the membership, of which there is still quite a few, to determine it's future.
UDL seems to finally gaining some track, but initially left ideology wasn't important for those who founded it. What was important was gaining as many members as possible.