There is a big question of how this fits with the future of ticketing. If we're going to end up with advance purchase with reservations for long distance travel and pay as you go for shorter distance travel, then thats fine, but as things currently stand the Intercity operators have to accept that they are providers of shorter distance travel and that passengers using PAYG must be accommodated. Lots of this comes down to how the PAYG options is set up, if there are to be regional PAYG schemes then that probably works with boundary stations. Your Yorkshire PAYG card would be valid Doncaster to Northallerton for example, and if travelling with it no reservation would be required within its boundaries.
I do wonder whether a certain Open Access bidder might be rubbing their hands together at this idea. First East Coast made their ticketing arrangements a significant part of their bid and demonstrated passengers being brought to the railway as a result which delivered their Not Primarily Abstractive result. If there is no walk up train available between, say Doncaster to York, added to serving a new station at Doncaster Sheffield Airport and adding a York to Lincoln service might be a good base to build an Open Access bid. I'm sure creating the circumstances for yet more OAO on the East Coast Mainline is exactly what LNER would want to avoid.