While many of us praise the Dahua cams, we do not praise EVERY model they put out. Many are clearly intended for folks other than us. This model is one such camera that is trying to compete with the other stuff out on the market now.
And even with the best cameras they produce, not many firmware updates come out, so it shouldn't be a shock to anyone that have had these types of cameras for awhile that this is normal.
I wouldn't be so quick to shut the door on Dahua. In my opinion many here jumped the purchase gun on this new series without waiting for actual reviews (although the promo videos were not very good to begin with). Who else are you going to go to?
Newer isn't always better.
Waiting for a review from someone other than a paid influencer or company promo video is time well spent than buying multiple untested cameras and being disappointed.
Apparently the 7-series has the capabilities we are looking for.
So as always it comes down to performance/cost versus your acceptance of motion blur in low light conditions.