It's worth mentioning that building reports always show up a lot of minor defects, they tend to try show just about everything that could possibly be a problem. Most of the items are rarely an issue or could even be considered fair wear and tear.
A building with lots of defects, the answer is simple. Tell the BA it's not suitable and ask them to find another property.
It may be under warranty, but I wouldn't want the hassle of chasing up the builder to get the problems fixed.