I fixed the broken link today (I'd already fixed it once, but when I had to reload the site after some server downtime, I found that I'd forgotten to update the master files). Totally my bad.
As for the complaints, attributes are
not just like skills (I'm not quite sure where you get that idea) -- they represent features that all sentient creatures are presumed to have, whereas aptitudes are learned skills that you only have if you sink points into them (much as people in real life only know how to do X if they take the time to learn how to do X).
Where straying from the OGL is concerned, this is intentional, although it seems to be a recurring point of confusion. Simple 20 isn't simply another way to play standard d20 (which is, argubaly what
all other d20 variants offer, including my own Core Elements), but a low-powered game system of its own
based on the d20 System (it uses the d20 System's default resolution method, as well as most of its skill system).
As far as I know, it's unique it this regard (i.e., focusing on skill-based, low-powered, roleplay). Iron Heroes, for example, probably comes the closest to doing what Simple 20 does by design, but even IH is only low
magic, not low
power -- its PCs are still extremely competent when lined up next to Average Citizen X. Simple20, conversely, isn't low magic by design, simply low power -- PCs are, by default, mundane folks*.
Simple 20 is aimed specifically at a certain target audience -- those gamers who favor verisimilitude in character development and, in general, "street level" heroes who may evolve into heroes of legend, rather than beginning their journey arraigned in such garb. If you aren't one of those gamers, then yeah -- Simple20 probably won't appeal much to you
Where terminology is concerned, those things
named differently in Simple 20,
work differently in Simple 20 than they do in standard d20 (those things with the same names work the same, or nearly the same). I think that there would be much more confusion if they were named the same and worked differently (which seems to be what you're suggesting).
Oh... the wound tracks... the psychological wound track was of my own design, although something similar has since appeared in True20 Worlds of Adventure, while the physical wound track came from the Toolbox Edition of Core Elements by Butch Curry (although, I think that he might have been inspired by True20 in that regard).
[*If you subscribe to the theory of the Hero's Journey, consider PCs in Simple 20 to be at the beginning of that epic cycle, whereas most standard d20 PCs begin somewhere near its apex.]