And you base this opinion on?
Lots of people have been working real hard for a long time to make this work.
Yes, lots of us have been polishing that turd since the late 90's, when politics (not the technical analyses) drove the decision to use the 737. I'm not currently working the program, which is a good thing, because it seemed insane to continue trying to make that square peg fit into the round hole without leaving glaring gaps. That initial bad decision opened the door for a whole host of more bad decisions. The turd is very shiny now, and we will make it be all it can be, but it will still be less than what's needed. We picked a very bad time to reduce our capabilities. No one currently working on the program is responsible for the inherent characteristics which everyone must try and overcome, but they are responsible for making a 2-engine medium-speed medium-altitude aircraft do the job of a four-engine low-speed low-altitude patrol aircraft (which was based on an airliner that was inherently more suited for the task).
Add to that the many, many problems (which I deleted from this post) associated with working with this particular prime contractor. It's almost miraculous that things are going as well as they are.
