People really need to think in terms of tangible results, rather than the most satisfying option here.
Sure, it would have given a lot of people great satisfaction to send Al Capone away for murder, conspiracy, etc. But, realistically and practically, it was tax evasion that got the job done.
Killing the individual mandate knocks the stool out from underneath ObamaCare, putting it into a death spiral.
However, even that is unlikely to happen. Instead the Senate GOP will try to pass a plan that has zero hope of passing the House, but the Democrats will filibuster it anyways. So status quo (aka, you get the “natural” collapse you are asking for) and the obstructionist Senate Democrats get to eat the blame going into 2016.
That may be the going-in strategy, but history shows that the Democrats and MSM will say that the Republicans purposely sent them a bill that they knew wouldn't pass, and blame it on Republicans. Basically blame Republicans for exercising majority power, just like how Democrats blamed Republicans for exercising their minority powers.
Republicans will never learn to just stand back and let the Democrats and Obama suffer the consequences of their prior strong-arm politics, and just work the messaging to their advantage.
-PJ