If you wanna fly, fly.
Personally, I would jump at the chance of working with KLC. If they close the LBA base and indeed all of the other bases in the UK (which I see them doing in due course), you should be offered the chance of transferring to KLM Mainline.
This is, atleast, what happened with the Aberdeen based KLC/KLuk crews.
KLC might not be the BEST of places to be, but think of where it could lead.