Even this is just kicking the can down the road. If you're going all in, you're facilitating regime change at this point. Doing anything else just ends up with the same or similar problems in 5-10 years.
Of course they're not going to nuke Israel, it's literally instant suicide. And they already effectively have a nuclear deterrent in their ability to basically completely disrupt regional oil production. This would also (probably) effectively be suicide but them attempting this is not something I would rule out if the regime saw the writing on the wall.
Israel can't fight any wars at all without our resources. I've always said that they're free to fight whatever wars they like, just don't do it with my fucking tax dollars, but the reality is that they can't do shit without our money and logisitical support, period, and US foreign policy is effectively uniparty so that was never going to change despite how unpopular it is.
The bolded part is the important bit. I am not confident at all in the Trump administration's ability to negotiate anything that was even close to as effective as the JCPOA. That ship has now (more or less) officially sailed. The JCPOA was also effectively kicking the can down the road, but it was working and could have been expanded upon later on down the line. Between Trump blowing that deal up for literally no reason and Israel launching a pre-emptive strike (100% with our blessing, despite what media talking heads would have you believe), Iran has no reason whatsoever to be trusting of any US-led effort at a diplomatic solution at this point.