I can only join to say, the direction Pleco is going is indeed amazing, it really deserves to be called 3.0, but then again, its up to you guys.
A small design change suggestion:
The popups to add unicode fields could be slightly modified to fit into one popup instead of two.
Current: tapping the edit button next to UNI opens the "Customize Fields" popup, then tapping "Add New" opens a popover with all the available unicode fields (screenshot).
Suggestion: all the available fields should already appear in the "Customize Fields" popup with those new green switches next to them, with a Done button in the top left and a Reorder button in the top right (as in manage dictionaries).
This is really just a suggestion, by no way is it a bug, but I kinda feel that this simplifying is exactly where your app is going towards.