I'm glad you have this product Heap, because I got tired of waiting for you to post SFX: Diabolism and went hunting for it myself. Good read by the way. When I saw that Alternity used strain, and you had converted it to Spell Burn, I hoped to ask you about your thoughts of GR's PH, but hadn't seen you post in this topic.
I don't know where to place the middle in terms of strain cost. Most stuff seems to be relatively low (4), but then you see examples where a Take 20 Psychic Weapon costs 60 Strain. (That's 10d - 12d! - serves them right, no argument there.) Mindswitch costs 12, so that would be 2d or 3d, by your suggestion.
I'd like to hear from people who have been using this system. What trends do you see in strain costs?
Also, with Psychic ability already being Feat Heavy, I'm not sure if there is enough room to add Improved Caster Level and Master Eldritch Flow. hmm . . .