It's hard to touch-select a particular element when you want to adjust a bunch of stacked items on a Canvas. Because of this, I find myself just editing the theme outside of the editor in notepad2.
Video tutorial or even a good web page help file.
Add the next coming calendar events like in "smooth calendar".
A line or strip thats parallel with the status bar to represent the remaining battery life.
Widgets like Beautiful/Fancy Widgets, or MIUI lockscreens, use images to represent elements of time, date, etc. It'd be neat to integrate a similar function in Chrono. so that times and dates could be displayed with more effects possible than text editing alone. Highly stylized flip clocks like this would be possible. :) http://melissapugs.deviantart.com/gallery/#/d4fhhax
nothing major but I have a few themes and when i want to add a widget, say for example a 2x2, itll b cool if itll only show the 2x2's ive made and not every single one OR even, after selecting the size, when viewing the themes to select the corresponding size is shown next to it that u made it for.
Main thing to me that makes this useless as a widget editor is the fact that you cant select an element without tapping it (and failing due to a much larger element responding instead.
Have a list that you can access for all the elements in use (numbered/or named) with previews and tap on the list entries to remove, duplicate or edit them.
If u can fix to show a # when there is a message or missed call and not always a zero in place
Have missed calls and sms in place. I know gmail notifer does not work for others like adw, but would like to have it in place when there is a solution
an optional time zone (numeric offset, or maybe by region if android API allows for it) could be added to time elements (both current numeric times, or possible future analog clock). This would allows for world clock designs (2 clocks with different time zone, quite handy when you travel or communicate a lot with distant peoples)