Mumbai Local - RailFanning nirvana.

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Many incorrect statements in your post, which I am correcting here.
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If I dont explain RQWL, does not mean that I dont know what is PQWL. I agree that there is a basic deviation, but we still need to discuss what is PQ and what is PQWL, cause many fans do not know this.
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I dont know what is shameless replacing of PQ with RS and RL. But i know a fact that many trains carry PQ, GN, RS and RL - all together. Simplest thing is go and check the reservation chart pasted on coaches, especially in AC3T and AC2T, they will all be co-existing in the same coach.
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I again say, PQWL is being maintained for "system configured" (this term is important) "certain source-destination passengers" for a Pooled Quota, which is end to end. Why end to end? because it is configured to accommodate passengers of starting as well as ending stations. However, start to end passengers are also eligible for GN quota, and hence if berths is not available for them, they are placed under GNWL.
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PQ is not zonal, its a term followed all across IR, because the reservation system is same across IR, including NR.
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I may respect Murli ji & Jain ji, but does not mean they know the correct knowledge. They may also know the wrong knowledge. I never said, I am the limit of knowledge, whatever I know I am posting here and correcting also.