York- Harrogate- Horsforth- Leeds appears to operate hourly so the Parkway station would suit anyone coming from York and beyond. There must be a number of people who live nearer to DTV airport but who have a very limited choice for holiday routes and who now opt for NCL however if getting to LBA becomes easier then coming by train via York could be very attractive. What about those in Scarborough, Whitby etc -which airport is easier for them ?
Living on the coast just to the north of Scarborough I used to use MME as my primary airport whether it was for direct flights to holiday destinations or for travels further afield on business (via AMS of course) or every now and again HUY when the 'right' flight appeared in their programme (not very often). MME has over the years become less than useless and may as well close completely. KLM are sticking with it still so a convenient link to the AMS hub is still there for those who want to use it. But neither MME or HUY could be reached with any sort of convenience by public transport which is still the case today.
I therefore started using LBA about 15 years ago but as Gray Ham says using public transport from this part of the world is nigh on impossible unless you want to stay in Leeds the night before (and possibly on the return night as well) as getting to/from LBA by public transport for the first flush of departures isn't possible. Evening returns face the same problem. Additionally, there are other factors which make traveling to and from the airport unattractive by public transport, so much so that I don't even contemplate it whatever the time of day my flights leave/arrive. They are: Travel Time - minimum 3 hours, Cost - minimum £45 each, Inconvenience - lugging cases on and off several forms of bus and train as opposed to one in and out of the car boot.
By car I allow 2 hours (never need that long) although 1½ hours is usually more than enough. It is a no contest situation I'm afraid so the new station near the airport won't be of any interest to this particular traveler. I have to admit though that were things to be different, ie more convenient and less costly, I would probably need to re-consider.