As far as I can tell B4XPages is a very mature and battle-tested library. I don't expect any changes to it at all, really. (I could obviously be wrong.)
My point is that it's probably safe to create your own version of it by unzipping, adding whatever features you desire, and make a new b4xlib, B4XWIMPagies3, or something like that.
Just a thought, as this is an area where we're not dependant on Erel changing something of the B4X internals to cater for a wish.