The "counter-proposal" is basically a restating of UKIP's currently policy that doesn't make sense, has minority support amongst the electorate and is so fundamentally flawed that it could never work. The document contains just about every lie, misconception and misunderstanding about devolution that has been put out by the Big Britishers that oppose devolution.
I have taken apart the "counter proposal" almost line by line (it's that bad) and corrected it. You can read it here.
The message from the party on this rubbish from UKIP Wales is that the NEC supports Union for the Future, the policy committee supports Union for the Future and the leader supports Union for the Future.