4 Commons seats for PEI has nothing to do with FPTP or PR or electoral reform.

It has to do with a bargain at Confederation dividing senate seats into 24 seats for each of 4 regions and decreeing no province would ever have fewer MPs than senators.

The Maritimes (Nova Scotia, New Brunswick and PEI with a much larger % of the population than they have now) got 24 seats with NS and NB each getting ten and PEI getting 4.

Ergo, barring an amendment to the constitution (and nobody wants to open that can of worms) little PEI with .34% of the population will continue to have 1.18% of the seats but gradually as more seats are added and PEI remains at 4 their % of Commons seats will decline. 

Inasmuch as my uncle occupied one of those four seats for 22 years I am a bit conflicted here.  In my uncle's time, the House only sat about 4 months a year, MPs got lousy pay, and it was a labour of civic responsibility for him not a trougher play.  But objectively speaking,  this is unfair to TROC.