Dear Mr. Tranter, I can't tell whether you intend to start a discussion on this discussion mailing list, or intend to submit feedback on a proposal. Maybe you are looking for discussion before you formalize your feedback.
If you do intend to submit feedback, then, once you have formulated a position, please use http://www.unicode.org/reporting.html Please make it very clear in your feedback what documents you are referring to, what you think should be changed, and why. I suggest you put your important points first, background later. (I got a bit lost in your narrative about likes and dislikes; I don't think this narrative format would be successful as feedback to the time-constrained technical committee.) Best regards, markus