The next TUPA will be issued in January 2016 and will only contain administrative procedures.
From what I heard there are no intentions to change the actual situation concerning the possibility for a foreigner to get a VISA for "convivientes".
As already stated it's only about civil rights for pensions, property, emergency health decisions. etc.
I doubt it very strongly that migration laws will change with the actual government. They already lost their schedule as in 2013 a project was issued which gave the government 9 months time to form a commission to present their proposals for the new migration law which should have been discussed in the parliament. Nothing has been done.