It does highlight what (in my opinion) is precisely the main thing that is at fault with the Privatised Railway and that is Fragmentation.
I hesitate to draw an analogy with another industry but in many respects this one does work.
You purchase, say, an item of clothing from a branded store or from a Comapny website. (I like outdoor gear, so let's pick on Rohan for the sake of illustration). And later you have cause to return it. There is a satisfaction guarantee on all their stuff, and of course you have legal rights in the event of fault etc. So for either reason, you want to take issue with Rohan about it.
Many Rohan stores are NOT run by Rohan but by third parties under franchise. Thus, technically, any contract; any consumer liability; and so on, rests with the company with whom you originally did business, and not with the brand nor with any other supplier.
This is the same thing, then, as with the Railway and its various TOCs.
However, if you want to open a Rohan store, then you sign up to certain franchise commitments, one of which is that all of you act as if a single whole; you WILL attend to consumer matters even if the original purchase was made elsewhere.
And so it should be with the Railway. All talk of legal contract terms with any one TOC should be irrelevant as all participants should be participating in a whole.
The sooner DaFT (or whoever) gets this part right and places these responsibilities within every franchise contract, the sooner we will benefit from the best aspects of a privatised, integrated system.