Here is my thought,
I can not see anything getting resolved until parties start talking so why not halt the industrial stuff, talk to management, try to resolve issues amicably. If no joy go back to your present position. At least this may get things solved, I am sure in interim whilst discussions take place your position won't be weakened much.
for background info
-I admit I am not fully conversant with all the issues
-I would love to join Cathay if given another chance, but would not join under a ban
whist talking about the ban, if people join under the ban it will just drag the situation out longer, and not lead to a very harmoneous and enjoyable work enviroment. So as I see it the ban should be droped or EVERYONE abides by it