Those hoses in the last photo are very grand for a south Wales valley community. I wonder if Hirwaun is beginning to gentrify a little due to its proximity to the Beacons.
As far as parking at Ely Mill station goes, I think you can pretty much forget it. Land values are sky high in Canton and Victoria Park and, apart possibly from a few disabled spaces, I think a P&R in Canton is pretty much out of the question.
Every valley community will have some well paid people. By building such houses, it avoids them having to commute from places with desirable housing such as the Vale of Glamorgan or Radyr.
Even outsiders might consider such houses due to their proximity to the Brecon Beacons National Park. The Heads of the Valleys Road (A465) also offers good access and should be completely dualled by 2060 - judging by the rate of progress thus far. Indeed, travelling down the Vale of Neath on the A465 expressway, one could be forgiven that they are driving on a German super highway through Bavaria. With land reclamation taking place at the former Tower Colliery site and the new Zip Wire attraction planned, it is indeed seeing something of a transformation.
Regarding Ely Mill: hopefully we will see a ticketing system that allows people to transfer between the buses from say Ely to the Metro. However, some people will no doubt drive and dump their cars in nearby streets due to a lack of parking at this station. You can see this happening already at several stations including Llanishen and Grangetown. The Ely Mill planners / Cardiff Council have already screwed up the new Ely Mill development by not allowing enough parking for the number of houses. This has resulted in the new residents parking their cars with the noses facing the houses and the backs of the cars sticking out into the road. (If they parallel parked, they would not have enough spaces so the residents have obviously chosen this way of doing things). It just goes to show that by limiting the number of car parking spaces thinking that the residents would not have cars just does not work. Goodness knows how they will charge the cars at home when they go electric? Wires over the pavements? Neither have they provided any space for buses to pull in and transfer passengers with the Metro at Ely Mill.