I've seen these mentioned before (as you've said), and whilst I do like most of the suggestions, I do believe Ashley adds everything to his todo list. He just codes things that have a higher priority (I'm guessing it's things that are wanted by many people, rather than small niche things).
Also, whilst I'm not totally sure, we may be underestimating how time-consuming it is for Ashley to produce certain things, even seemingly simple things like "bookmarks" and stuff in a quick amount of time, therefore, things need to be prioritised and less niche things are developed first.
If it was easy to make all the features that people request for Construct 2, then Ashley would have added everything within days, and we'd see MANY game-creating software similar to Construct 2 out there. <img src="smileys/smiley16.gif" border="0" align="middle" />