Some teachers began writing their own things modeled on what was in the projects. Unless teachers are very dedicated this is a very difficult task. Today the Internet does make it easier to do, but not easy especially if you have never done such a thing. Therefore, if your school will purchase one such unit in the program it is well worth serious trial over multiple years so you can personally refine your skills. I have questions about the content selection for the units which might need to be different for schools in different settings.
Programs can have many of the same short falls as textbooks.
However, as a methods instructor, you cannot present all teaching strategies well. People using the materials without the help of attending special workshops may have some problems because of lack of familiarity with particular ideas or vocabulary. Your offer of sharing experiences is good, and I would suggest that you post something once in a great while to the listserv. Teachers lurk and many teachers on teams might find it helpful.