Well, I guess if you really want a gold version. You can also just craft the golden Murk Eye straight up after the format split rolls out.
Since I have no Golden Classic Murlocs, it would cost me 4000 dust to get him. Its just not worth it.
I mean if you're close to getting it, it's 1600 dust back. I have the basic ones and golden war leader but I don't have any of the rares golden, at 800 each it's not worth it but if you need just one or only basic ones it's worth grinding now and get 1600 dust back.
On my f2p account, I only need one rare to get the regular murk eye, if I don't get it by the time the patch hits, I just craft it for 100 dust and get 400 dust back. profit.