I'd suggest the presence of FZRA might prompt alarm bells in the mind of the thinking pilot that go way beyond aitframe icing.
How do you know you'll be able to stop? At all.
Do you plan on leaving again anytime in the forseeable future, because decontaminating an aircraft coated in clear ice can be a serious problem.
But most of all, are you certificated to fly in it all (almost certainly not) and can you be sure the runway isnt a skating rink?
Just divert and let some other silly arse find out the hard way if he wants to badly enough.
Nothing, but nothing would make me even consider it for an instant.
Equally, no chef pilot I've ever met would question that decsion for an instant either.
Equals no- brainer.