A lot of MW sets had very good samples, and then the actual production sets shipped with major QC issues. For example, MW Heresy was remade, and the remade sets are also scuffed so they are remaking it again. Heresy had great samples! And Heresy isn't the only MW set with big QC problems.
The QC is something that would/should be improved as far as I know.
In any case : The customers should get what they are paying for and nothing less. That's why the vendors rejected the heresy orders. MW has to make sure they deliver what they are getting paid for.
From a designer POV, I can only rely on the samples they make. The vendors are finally delivering the "mass produced" items and its their job to reject deliveries if they are not good enough.
So the first thing, I should confirm is if their samples are good enough to even consider going through with them.
If not, as I said, I will look into others.