Discarding: the traditional mixed-up manner, or the neat a..

When reviewing the IMJ Rules, I come to a question in the review list:
whether discarded pais (tiles) should be placed in a *disorder* manner as in
the traditional way, or be placed in an *orderly* manner as required in
CMCR.

My opinion is that the disorder manner shall remain, mainly because this is
a traditional practice of mahjong. Besides, placing discarded pais in a
disorder manner may have an advantage in maintaining its playability and
practising the memorizing ability of players.

Wonder how others think, especially those who have experience in open
tournaments.

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Cofa Tsui
www.iMahjong.com