Well, I am not sure and please anybody correct me if I am wrong.
Currently the LCL is mostly LGPL, which means I can make application with the LCL and I don't have to release the code of it, if I don't make any changes to the LCL.
If the FreeCLX would be used in the LCL would mean, that the LCL also becomes GPL'ed (I think that is the nature of GPL). If the LCL is GPL, than all applications made with GPL will also be GPL. That means you only may distribute your application, if you include the source, which is much more restrictive than the current LGPL license of the LCL.