I think the negativity is borne out of decades of failure by Leeds City Council to push through anything remotely useful with regards to a well connected, fast, efficient and cost effective public transport system. After all, White Heather, you have been quite negative yourself about the bus plans.
I have long since argued that the Harrogate line is the key to all future modernisation of the transport system in the Leeds City Region as conversion to light rail would be fabulously sensible and provide a cheap and frequent mass transit system with the minimum of work and cost, along the same principle as the early stages of Metrolink. This would then be the catalyst for further conversion and new build light rail in Leeds and the surrounding area which would undoubtedly include a spur to the terminal building with an additional stop in the car park somewhere, possibly eliminating the need for buses which will cost an arm and a leg to run anyway. The main blockers to any attempt to consider this is the Harrogate Chamber Of Commerce who will not give up their beloved one train a day to London, even though rerouting via York would see their service improve both in terms of frequency and speed, as well as improving connections between Harrogate and York, which are diabolical. Until that position changes, we are stuck with what we have. At the very least, a new station promising all that has been promised is good news for the local area and will indeed make LBA more attractive to those travelling from further away.
Since you mention it, White Heather, what we could do with in this situation are some figures from East Midlands parkway, Southampton parkway and Liverpool South Parkway - all of which are significantly further from the terminal building than our proposal and include (at Liverpool and East Midlands) a paid bus journey between station and airport - to show us the potential benefits of the station to LBA.