The only reason for BT to add extra FTTC-like nodes into an area where the PCP already has an FTTC twin, is to extend range beyond the (approx) 1.2km distance that superfast speeds can get to.
On the mainland, this issue affects a small percentage, and we have seen one trial box installed for this purpose, aka FTTRN, covering 16 properties in North Yorkshire. It is, unfortunately, too expensive to get power; so BT look like they'll be spending the next year deciding whether there are alternatives ways of getting power.
In Northern Ireland, there are many more lines that are too far from the FTTC cabinet, so they have started a new project with this kind of infill in mind.
If this were to happen more, in the current rollouts, then BT are likely to concentrate on those whose line speeds are below the 24Mbps superfast threshold.
In the future, G.fast nodes might help you; that could be anytime over the next decade though.