I am still in the observation phase here.
I have been a general contractor in Ecuador and later South Florida and subsequently had a construction company in Spain before coming here. All quite different building technologies.
However, I think that in general they can build quite solidly.
Still, they are prone not to pay attention to some very basic building principles and that starts from the design by architects and engineers.
Issues with humidity, namely from below are typical and even generally accepted, although they could be avoid for life easily when doing the right thing at the start of the construction.
The beam an column concrete frame construction is a very valid approach in regions with earth movement (quakes). Still, it does not make much sense to have these columns "calculated" by an engineer, to then find the plumber to use these spaces to run his pipes thru (empty columns just don't support much weight).
As mentioned, electrical wiring is dreadful.
What I also observe, is that even Dominicans don't seem to hold in account typical local problems when planing their homes, like the common lack of continuous /uninterrupted water supply. Tinacos are never planed for... they are almost always added somewhere later, usually creating an unsightly eyesore on a brand new villa.
In general, as others mentioned, it is supervision by a competent professional which will make a big difference, together with good and thought thru planing and taking a local aspect into account, I might add.
... J-D.