I left some feedback on the new website that they link in the article. Hopefully more people do this too.
Milwaukee
Group for Milwaukee area and SE Wisconsin.
Banner image by Bfkenney on Wikimedia Commons, licensed under CC BY-SA 4.0. Icon is Sunrise Over the Lake (People's Flag of Milwaukee) by Robert Lenz, released into the public domain.
Our family enjoys the domes and tries to get there a few times a year. I do like the iconic architecture, but I can appreciate the inefficiency and financial hardship of maintaining such nontraditional structures.
I also think it is fair for them to focus on preservation of the natural/horticultural aspects as the more important focus. I'm glad it seems like it won't just be demolished and all of it destroyed and gone.
It's a shame, but I don't think the Domes can be salvaged in a way that the county can afford. It would be great if they could be replaced with something similar but more maintainable - maybe a connected series of large greenhouses.