As far as your "push toggle" concept, you could buy a Z-wave smart switch plus add-on switches and have this today. There's no requirement to actually connect to a Z-wave network, although smart switches are much more expensive than standard switches.
Right. Apologies, I meant to offer this as a small feature that comes with many of these "smart home" additions that actually is kind of nice. Just with the major caveat that the "smart home" aspect is... not really needed or wanted.
And with a huge confession that this isn't that big of a deal.