Extended Weapon Transmog 1H<>2H etc.
So, I have also been playing another server recently, which also had a transmog system - the difference (among other things) was that you could transmog weapons far more extensively than on Frostmourne / Lordaeron.
Specifically, you could transmog a 1H model, onto a 2H, and vice versa. This effectively let you play a pre-Titans Grip Fury (even if only aesthetically).
I personally feel this would be a good chance to add to the already existing system (those who do not like transmog, can turn it off wholesale anyway), so I don't see any compelling counter-argument from a meta / need to know position; it would only give players more flexibility in their transmog choices.
Many thanks.