As usual you are mixing up the BASSA/BA dispute with the general point!
This isn't a general thread though. It's a very specific one.
On the wider point, If BASSA and other unions continue on the path they seem intent on then they may be making more anti union law inevitable. If we see mass disruption over the next 12 months we'll either see legislation in this parliament or if the Lib Dems baulk Cameron will call a snap election and no doubt win convincingly on an anti union platform.
I don't think we need better legislation just better unions. Theres too much representation of their political ends and not enough of their members.