Certain Hit/Reverse Certain Hit probably should be Direct Hit/Reverse Direct Hit. The concept in NoR is that Certain Hit activating will make an attack ignore all evasion and all other accuracy checks, similar to a crit, just that it doesn't then do 1.5x the hits.
EDIT: Reading through the Hit Determination notes, right, yeah Sure-Hit is basically that. Same concept, just with NoR specifically it means all hits go through, not just one.
SECOND EDIT: So I had a thought just now regarding the DoD SEXP curve, because it's something I'm constantly thinking about how to nail down. I'm somewhat uncertain at this point about the curve I put in. I'm thinking of doing an alternate patch that involves completely restructuring not only the curve, but the amount of SEXP monsters give.
The thought I'm having I did try before but had issues with because I made the mistake of trying to do it with monsters giving single digit SEXP with small SEXP requirements, but the internal math for that tended to truncate those single numbers into decimals that got floored to zero, making enemies basically drop no SEXP. The solution to that, I realize now, is to just multiply by ten and having "a single point" be internally 10 SEXP.
The idea from there is to try to roughly structure the curve to be roughly attainable in a certain number of battles, then having soft caps at points about where it would be time to go to the next stratum, with those soft caps multiplying the required amount of SEXP by about ten times, while similarly increasing SEXP from monsters in that stratum accordingly to make it so that if you want to level, you either grind heavily in the previous stratum, or just fight normally in the next stratum.
As a practical example, in the prologue players should be getting to about level 3 in their element. From 0 to 1 should be about 15 battles, 1 to 2 in 20 battles, and 2 to 3 in 25 battles, which should make everyone about level 3 by the end of Forest of Magic. Then the required SEXP should be increased heavily, so that it'd take a long time to get to level 4, but once first stratum starts, there would take about 10 battles for 3 to 4, 15 for 4 to 5, 20 to 5 for 6, etc. Level 12 is expected for end of first stratum, so 6 to 7 would be 21, 7 to 8 22, 8 to 9 23, 9 to 10 24, 10 to 11 25, and 11 to 12 25, before once again a major jump in SEXP. I would have to fine tune this, but I have a good idea as to how to do so.
The long and short of it is that it'll be set up more like AP is in FFV or something, at least in general scaling, to make figuring out the numbering and curves easier to figure out. The ultimate goal would to make it that to go from level 49 to 50, it would require killing one of the minibosses in the last part of Black Sanctuary about 20ish times, rather than the hundreds it would take normally.
The general benefit to this too is that characters trying to play catch up will be able to do so extremely easily, making trying new characters much less of a hassle.