I agree and I know it's a silly suggestion, but I fear the large scale solution may leave more people without than originally expected.
Perhaps it isn't really that silly.
I saw two different presentations from BT (dated late 2013) that either mentioned "NGA Amplifiers" or pictured them in the network.
Here's what I wrote, with some links, a while back:
One presentation, from Openreach NGA manager to Lancashire county council, lists some things for coverage of the final 3%. See pages 11 and 12 of this Lancashire presentation.
Another presentation, from a chief engineer in Openreach responsible for access-network strategy to NICC on their open forum day, The presentation is here, on NICC's website. Page 9 has some solutions (FTTPoD, FTTdp, and wireless for rural access), while page 18 mentions some "BDUK infill" solutions, including "NGA Amplifiers", an "all in one FTTC cabinet" located deeper in the network than the standard PCP one, wireless cabinets, and more.
Who knows when, or even if, any of them will get deployed in reality. But it is good to know that solutions are being thought of - it means they are starting to think about the final 10%.
But up until today, I hadn't seen a piece of equipment that actually did the job.