Glad you enjoyed it! Now that you mention it, on reflection I don't find "abandoned" very convincing as an anagram indicator. (It shows up in a few online lists but I think the nounal sense of "abandon," as in recklessness, is lost with a -ed verb ending.)
The "yes and no" in 4D4DBirdie? Yes, and no... (5)[-----] is intended to indicate that the definition is applicable in one sense, but not in another: I'm thinking of golf scoring, where a birdie is one below par, and an eagle is two under.
Thanks for your feedback, it's really helpful and really appreciated.