Hey, the mod seems really cool, but I can only really play with a controller comfortably and well, its definitely a struggle to find enough buttons to try and cope with everything the mod has.
I can offer suggestions as to what I think could make it easier for me to play that might be workable, the main one being how the skill slots work. As they are, you basically need 4 free buttons to use the skills, however if it was made so that the skills were set up as a toggle menu, so one button could be used to cycle through them and another to cast them. Perhaps like the inventory system it could be made that you can still toggle whilst the game is paused (that function in Heretic and Hexen helps so much to make them more manageable for me)
I am going to see if I can use antimacro to work out a system that can work for me using its various options, but I thought it would be worth asking if you'd consider some controller support based options.