Gotcha. I would certainly highlight all of that in your cover page. I'm just playing devil's advocate with you and putting my newb hat on.All good points and I do fully intend to write a cover page for the book when I am done with it that explains the system.
As for why should they buy this instead of playing the free SRD I would say is due to ease of use, and the fact that all of it is there. The SRD has quite a bit of 3.5 but hardly the largest selection since it includes so little of the massive number of books from 3.5. None of the campaign settings, none of the complete books, none of the races books, etc.
I'm not publishing core content only that is rewritten, and it includes classes, spells, etc that only exist within my system.
So sure if you want to try to teach yourself 3.5 you could spend a very long time reading the SRD, or you could pay a little money and have a system that makes much more sense and is one book for all the classes, etc. I don't expect to make millions but I think it would be a really fun system for folks.