If it isn't too late, might I suggest a change in the name of this proposed character?
The Pittman Initial Teaching Alphabet [1] uses a pair of th ligatures to represent the difference between unvoiced th and voiced th. Neither looks like this character, nor like a plain th ligature that might be created by simply overlapping the letters. If the name of the proposed U+1D7A were changed to LATIN SMALL LETTER VOICED TH DIGRAPH then the character could also be used for the Pittman ITA, or other schemes for representing a voiced th (as does the example given to support U+1D7A in N2645) without requiring a new character to represent the same basic idea. I think I have enough documentation that I can a prepare a proposal for the Pittman ITA, but I think that it would be better for the voiced TH digraph to be unified with U+1D7A. The two would never be used together and both express the same basic concept of a voiced th sound in English. Such a unification would of course be dependent upon a change in name for U+1D7A in the period before it was officially adopted. [1] http://www.itafoundation.org/alphabet.htm
