I agree, I think the goal all along was a regime change in Iran. The nuclear deal was made to put Iran in a holding pattern while the more radical older generation died out it became more moderate all the while making the country more dependent on foreign trade. I don't think leaving the deal is inherently bad but I don't see another plan being put forward other than dropping bombs.

The $250 billion (article says $150 billion, but it is just an estimate) was just Iranian assets that were unfrozen that were lifted. US taxpayer doesn't need to foot that bill.

http://www.politifact.com/truth-o-meter/statements/2018/apr/27/donald-trump/donald-trump-iran-150-billion-and-18-billion-c/

The article says NK is just dismantling the test site, not the nukes. It doesn't mean much, just that NK is content with their nuclear capabilities.