I’ve experienced these exact problems with the Developer Assistant AI tool. The DA doesn’t seem to retain the Verse code that it provides in such a way that would allow fast iteration (which I assume is the whole point of the DA). The code provided by the DA is often in error. It is extremely difficult to communicate the errors back to the DA. If you do get the DA to understand its mistakes, the DA often produces all new code that seems disconnected from the original.
This tool could be an amazing help, if some effort is put into making it work.