You'll end up with something like the 1/60 yf19 and 21, it will look good in fighter mode, but battroid will be wonky. some people will like it, most will endure it and some will hate it.
I've never cared for the battroid on the VF-4, and I'm not even a big fan of the fighter mode (a little too space mountain, imo) but as long as the fighter mode looks kick ass, i'll probably get it.