That kind of stuff may be effective, but politically it would be a disaster. The mandate itself, and "like your plan, you can keep it" were bad enough as it was. Those measures could have cost Obama the election, and maybe somehow could have led to ironically enough, Mitt Romney coming through with healthcare reform based off of his Massachusetts model, with some adjustments for things like birth control to appease the party. But that might be a long shot.
Abolishing the use of discrimination based on pre-existing conditions was a political slam dunk. The Republicans even thought it was a good idea. However, the mandate was extremely unpopular, and remember, Obama's own party wasn't even sure about the mandate, with some not voting in the House for it because of that. You add punitive measures like that and you might not be able to get it passed. In fact, I am guessing that this was considered, and rejected, for political reasons.
I am sure it was but do it right or don't do it at all. The tax had to be high enough to make sure everyone who was mandated to be on it was on it.