witzendoz, you beat me to it, I was looking up the links for the Claremont works, came back and you have put it up. I confess that I don't recall any talk of an extra platform there, just platform extension, DDA compliance and new bus interchange.
The FAL connection means that there will be higher frequency services between Claremont and Bayswater, a bit like the current higher frequencies between Cockburn Central and Whitfords.
The main good thing is that they did decide to do the turnback at Claremont instead of Daglish, so a few more stations get the benefit of the higher frequency.
I'm fairly sure that Subi only takes four cars at the moment, but seem to recall one of the PTA annual reports a few years ago including mention of purchase of land to allow for future platform extension works there. In the short term we can just look forward to the B's cascading down to the older lines when the C's start to arrive.
I doubt that Freo will get much more until gentrification finally kicks in there. At least the line was reopened.
And thanks again to Mouse for your always well informed input.