This may have already been asked. Personaly I would desperatly like to be able to have more than one catagory with in favorites amd my own filters. I.e a way i could make folders to sort them by my own system.(like Painting, sketch, most used, realistic, glass, ext., ext.) Also a search for field with in the fliters list in the program. I often forget where a filter is kept but do know its name or its authors name a way to search like that would be wonderful.
A low-res or med-res preview in both the main program and the edit feature would speed up the time a user needs greatly. You can always go to a hi-res render after you have decided your basic effect you want. this would get rid of a lot of the downtime you have when trying out a new filter, getting a specific effect, or designing a new filter.
Also a way to bring in your own texture maps. (i.e. I was wanting to make a different ice filter using a litning texture map i made in psd. I could control the direction of the main cracks, the numbers of the branching of cracks as well as the glow around them, ( the glow would look like the frost or ice rime that that builds up around a crack or raised area on the ice.) The textures you offer are great but none are quite what i need. I know this feature might not be tileable, but it would greatly expand what you can do. i.e. 3-d letters, mountain ranges, and other dimentional effects.
A rename filter option and copy & paste would be helpfull too.
Hope this can be of help.
saylee