The only improvements I can see would be to allow more then ten icons out-of-the-box. The stock quick icons mod doesn't suite my client needs (I really don't want them to have quick access to some of the defaults), and if this mod could have more than 10, I'd just replace the stock mod.
The other thing would be to be able to reorder them without having to re-enter each one. The latter would probably require restructuring the mod and making it database driven- so why mess with a good thing?
Thanks for the great work- it is really useful!