There are no current plans to update L32, although the project would be happy to accept external contributions.
On a related note, implementing C32 version 2.5 can be a difficult prospect. I was working on doing so a while ago in Laika and ran into some conflicts with templates used by the HITSP C83. You can find a description of the situation here:
http://github.com/CCHIT/laika/issues/labels/eedrummer#issue/68
I don't know if this issue has been addressed yet, but it is a pretty major bug in the spec if it still exists.
~Andy