I'm about 100% certain they're open to none of those suggestions except the big starting pay increase. 
They will never accept anything remotely resembling meritocracy, while your suggestions are predicated upon this being a driving force for improvements.
Meritocracy alone would vastly improve public schools, regardless of juggling waves vs benefits, education requirements, or telling bad parents "STOP VOTING YOU IGNORANT ****S!"
Bad parents and lack of discipline are cultural problems, and no changes to public schools, unions, or teacher evaluation can really combat them. As long as certain areas have voting majorities who don't care about their kids except that they be out of the house as much as possible, and as long as we encourage this by rewarding such welfare trash with more money per child, there's no school solution.
Public schools all over the country could be vastly improved in a lot of ways. Meritocracy would obviously be a key tool (which is why unions won't have it--too many of them are underperforming and don't care to improve). But too often we conflate the reasons we need these improvements with problems which are solely cultural. No school changes would significantly impact the performance of the crack babies of welfare moms who know nothing of work and a better life.
[I wish I could obey forum rules]