1) Hue Rotate effect changes the color of a footage even when on default value. or R2, when on default value\0 the image stayed original. only when tweaking with the value slider, then the footage starting replacing\rotating hue. for example, pink\magenta becomes red even when the Hue Rotate parameter is 0.
2) Keystone Crop opacity parameter does work well. works as ON\OFF.
3) +\- controls all over the software are not mappable. can't assign midi to + or - but instead to the text box that contains the numbered value that makes unwanted resolute.
4) just like that, with no apparent reason, arena take FOREVER to load and even become not responsive. i have to delete the preference folder from the resolume 4 folder under my docs and start everything from the begining.
5) i am putting hue rotate as layer effect, mapping the hue rotate parameter to midi and limiting the range to 0-0.85. while on the same session, all good. but if saving the comp, closing and restarting arena (and i guess also avenue), the mapped hue rotated range defaults to 0-1.00 and becomes irresponsive to the midi.
i try to change the value but some behavior in the software push back the slider to 1.00
6) addition of a floating layer, one that doesn't changes with every deck change would be blessed. on the other hand, a lock button for a layer can also help.
7) auto pilot - the ability to set a duration for every clip not only still pictures.
) PLEASE ADD A SEARCH BOX in the file\comp\effect for what ever's on the specific list i am looking at that moment. it happened so much that i am trying to improvise in a middle of a show, and going to a directory that contains the clip\footage and i remember a part of the file name but f**k it! 
i need to pass the whole list and search for it and that my friend is real hard on a FULL HD laptop screen 
And then just type whatever is on your mind and maybe then filter it by type (file, comp, fx, source) like in "