Then again i've not heard about PAF complaining about RD93.
The PAF/Army servicemen generally don't gripe about equipment in public. You won't see complaints about any specific equipment in the public sphere. That doesn't mean all their gear is flawless, they just don't whine about it in public.
As for the JF-17, the engineers I've spoken with are very happy with it, mostly because they see it as their own. It's like an attachment you'd have to a car if you assembled it in your own garage with your own hands.