If I'm understanding the plan correctly, the ideal Boehner timeline is something like
* pass the short DL with the negotiation requirement
* negotiate a grand bargain in six weeks
* pass the grand bargain to reopen the government and raise the debt ceiling further
* never face consequences
The big takeaway from the Politico cover on Boehner today is that Boehner really does view himself as a deal-maker and really does want to make a deal with Obama. That's where all this Grand Bargain stuff comes from in the first place! So if Boehner's saying his plan is to negotiate, there's a good chance that might actually be his plan.
The big problem with this plan, of course, is that Boehner hasn't demonstrated any ability to provide Republican votes for a bargain, and he hasn't demonstrated any ability to provide Republican CONCESSIONS for a bargain. That's presumably Paul Ryan's job -- but it remains to be seen whether Ryan can actually bargain, or just extort.
It's just money. As long as that money comes from somewhere, it doesn't really matter for the law's purposes. It'd probably be nice to hang onto it, but the reality is that the taxes on Obamacare were mainly put on there to make the bill deficit-neutral, so now that it won't be scored again, it's okay if we jettison some of them (with the exception of the individual mandate).