Here is a comment placed after the following article:
The problem with the threshold is not so much its size, but the fact that votes, if cast for parties that do not pass one or other treshold, are wasted.
The wasting of votes in this way is widely hated, for well-known reasons.
Reducing but not eliminating the threshold reduces but does not eliminaate this vote wasting effect.
Reducing or eliminating the threshold prejudices the avowed purpose of the threshold – to discourage the proliferation of small parties in parliament.
The solution is one easily understood and widely used in many situations where we want people to make choices, and we want to ensure that almost nobody misses out. That solution is to offer each voter a second choice of party vote.
No need for a complex preferential voting system. Just a second choice eliminates the problems. Voters can vote first choice for their preferrred party, and second choice for a party which they think is certain to pass the threshold. If their first choice does not pass one or other threshold, their vote goes to their second choice.
This is easy to understand, easy to implement, and solves the problem.
More details at twochoicemmp.wordpress.com