I think the Q400 is a good machine - fast, powerful and efficient - but in my opinion it could have been more developed. Two things illustrate this; the wipers and the lack of an MDA bug for landing.
It seemed to me that the design team realised late on a Friday afternoon that they had forgotten about the wipers, and bodged something up from the local hardware store at the last minute.
The lack of an MDA bug on the altimeter instrumentation was extraordinary - you had to remember the figure ! Flybe fitted little plastic mechanical number counters on the glare-shield that you could set to display the MDA as a memory aid.
Maybe these things were sorted in later versions?