I think it would be nice if that works, but I don’t remember now if it does or not (I think I remember people having used it in the past, and got it working).
The key however would be to make the custom field view (…_CFV) the view to use for the LU in question in the Object Connections screen. Change the view there and see if it helps.
If it does not, we could look into supporting it, but we cannot do any promises to change it since there might be “technical stuff” stopping is, or making it very hard.
Let’s try changing that view first though.
Ideally we should automatically use columns from the CFV as I know we do in other places, but it seems we are not (then you should have seen the new columns).
Bear in mind that, should the custom fields/columns be “calculated” (via a Get method for example), then performance might suffer, and we could not do anything about that.