Why are aerials not available or are low resolution?
Due to Waze’s business model (which keeps the product free to us users) they are limited in what sources they can use for aerial maps. Normally this means using free sources which will of course be of lower resolution or availability then aerials available from commercial sources. If you know of a source that the licensing appears to be free for commercial use and in particular has no strings on derivative use, then email that source to alpha@waze.com and they will look into it, and see if it will work.