One thing I wonder about, isn't Fire a bit... overpowered? I love that power, it's possibly my favourite of them all, but when it's upgraded to 2 and then 3, it seems like it's a bit too
useful. I can easily overpower single Archies, Arachs, Mancs, Barons, and groups of Revvies and Hell Knights with it, just by firing a bit of Fire here and there.
Also, could you make Gravity a bit more useful? Maybe... make it draw blood money to you? By holding down the alt-fire key, you would draw the blood money towards you whilst your psychic meter constantly drains. And when just pressing the button, you would fire Gravity like you usually do, but not only would it move the enemies away, it would also affect the blood money, meaning that you could kill a enemy in a cage, switch to Gravity and shoot a burst into the cage, the money would bounce against the wall in the cage and then towards you. How's that sound?
Other than that, I can't find anything I noticed now. This is a real fun mod. I played Speed of Doom with it and ho boy, that has to be some of the most frenetic, speediest and most fun I've had with DooM for quite some time.