The problem is this - minority representation will be subject to the whims of mainstream politics which will be firmly controlled by the majority. Elections will not matter as minority concerns will not be able to influence the outcome in any way. You have yet to comment on the ethnic housing quota by the way.
Contrary to your point here, minority concerns do influence the outcome.
Prior to GE 2006, I have already projected that if WP cannot win at least 45% of minority votes, we will not be able to win Aljunied. This projection has proven to be right. Whether we like it or not, any parties that want to win any seats, will have to win the minority votes.
Any party that wants to participate in any group elections (just like GRC) will still have to field at least one minority candidates. The system works in such a way that at least one minority candidate will still be elected from that group. So what's the difference between the present system and this PR system? The only difference is that its not going to be one party win all.
The National MP system could be looked into as well. There are so many ways the PR system could be configured, why would you necessary view it as discriminative?
Ethnic housing quota system is a debatable system. It could work both ways and it will have its merits and demerits. You can look at it as the quota is measured against minority presence, but it could also be viewed as a quota against Chinese dominance. For example, if you are talking about 25% quota for Malay, it could also be set by saying Chinese cannot be more than 75%.
I would prefer a "dual quota" system. It will say, quota for minority not more than 35% or 40% and quota for Chinese not more than 80%. Why 35% or 40% for minority? While we want a well integration of citizens, we do not want to hinder the prospects of minority in buying or selling their flats with a tight quota of 25%. It is ok to have a quota bigger than national proportion to provide some flexibility. On the other hand, I do not like to see All Chinese dominance in an area as well. A 100% Chinese dominance in an area is unhealthy at all.
How about doing away with the quota system altogether? I am not in favor of that for many reasons.
Of course if the national proportion of racial distribution changes, we could revise the quota accordingly.
Actually I am more concerned about rich and middle class divides. The clustering effect of having the rich living off in their own little paradise out from the normal HDB heartland is more worrying. We may just have more "Elite uncaring faces" in the process which will create more social tensions. Well, this will be for another time.
Goh Meng Seng