Ugh - why do people persist in believe what they -want- to when facts show otherwise?
Disney has agreed to cooperate with the train service. They have agreed to attach their internal service to it, and further, they want to operate the station. They will not make it harder to use then the -current- Magical Express.
Magical Express will cease to exist when the train becomes operational, replaced by the train.
And lines? What lines? It's physically part of the airport, not some nearby station to shuttle to - you walk to it the same way you do the parking garage, car rental, or Disney buses now. From there: It's a train. You don't wait in line for trains. You simply show your boarding pass and enter the pier and possibly wait - less then ten minutes based on the train frequency - for the next train to arrive and board. Most likely there will be a train waiting for you.
Luggage? Handled the same as Magical Express now, but also probably put into a train car dedicated to the bulk of luggage transport - just like how Magical Express has luggage on it's own truck from the airport. OMG, there are even airports like Denver that move people's luggage on trains once it's checked to load/unload all day. Trains with people on them going from point A to point B.
Then you arrive at WDW station and transfer to the internal system. Buses to certain stops, certainly, but Disney has the option of extending other systems to the station too - it's 5 years out and Disney hasn't commented on what they plan to do with the station they intend to OWN and OPERATE.
Sometimes the mindset of people on this forum just baffles me.
Good luck taking Magical Express buses in 2015 when they cease to exist.