I'm also 6' tall, but have short legs, so I have the opposite problem: I usually have the seat close and I'm cramped. I have found the Corolla easy to get into a great position for long drives, save for the armrest on the door. The seats are not long-haul perfect like many German cars, but pretty good for an entry level unit. The center armrest is positioned fine, but needs a bit more padding. Pedal position is good, and a nice dead pedal is well located.
Good for long days:
Cruise control that works well.
Good AC power (was 33C on our way home from the mountains on Monday)
Great fuel economy (5.0L/100km!!)
Decent seats
IPOD Stereo plug
Low wind noise
Trip computer
Range (~800km before low fuel light)
Cupholders/cubbies
Not so great:
Boomy stereo at speed, despite toning the bass down. Could use better speakers methinks.
Hard center armrest
Trunk hinges that require careful packing of your gear
Tire thrum from entry level all-season tires
Small trunk opening
As for your seating problem, probably not much that can be done...