Why was L2/25-061 provisionally assigned?

[piotrunio-2004@wp.pl]

In  www.unicode.org Submitting Character Proposals (unicode.org)  it says " Often a proposed character can be expressed as a sequence of one or more existing Unicode characters. Encoding the proposed character would be a duplicate representation, and is thus not suitable for encoding. (In any event, the proposed character would disappear when normalized.) For example, a g-umlaut character is not suitable for encoding, since it can already be expressed with the sequence <g, combining diaeresis>.".   I really don't get why L2/25-061 would be provisionally assigned to U+208F when it can be composed with combining characters (ˈ̩ U+02C8 U+0329) or (ˌ̍ U+02CC U+030D) which should be equivalent to the proposed character, and the potential use of the existing combining characters is not mentioned in the proposal, but the proposal owner was informed of the compositions before the  Recommendations to UTC #183 were made .
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