No house parties! Once the election is over, people are seated randomly and every vote is a free vote.That way there is an organizational structure for the creation of platforms, but proposed legislation has to legitimately convince a majority of sitting members.

None of the above! This becomes a formal option on the ballot. If NOTB wins a constituency, there is an automatic by-election and none of the people on that ballot can run again. If NOTB is elected to the ruling party, well, that's a pretty big do over that comes with a pretty strong signal that every party and every candidate is out of touch with reality.

Abolish FPTP! There are some legitimate arguments over the pros and cons of various electoral systems, but every honest person knows that FPTP is fatally flawed.

Citizens' committees! I fail to see how a large enough collection of randomly selected people could possibly do worse than our current crop. We might never have true sortition and maybe true sortition is a bad idea, but a randomly selected citizens' committee would let us test the waters and experiment with different amounts of "power to the people". At the very least, a parallel structure with no party alignments might come up with different ideas than we have now.