1) They have removed AC. Attacks are made against the target's Reflex Save.
2) Hit Points for 1st Level is (significant number) plus Con Bonus. (If I remember, one Class had 14, the other had 20-something + Con Bonus).
3) Classes don't have Save Charts, they do have Base Attack Bonus plus the advantages for each Level. I didn't see any 'Dead Levels'.
4) Feats that give Attack or Defence options are listed with your Attack/Saving Throws (which were called Defences, I think...) as a reminder of what you can do.
5) Hit Points have a 'Threshold', (124 HP, Threshold 33 for Yoda, I think). I have no idea what a Threshold is.
6) Every four levels you increase two Attributes, not one.
I remind, this was just a preliminary check.
I like the fact they removed AC. I've been considering doing an RPG setting using a seriously modified d20, and one of the first ideas I had was to make Saving Throws a static number, and have the opponent make a DC check against the Saving Throw. Making AC into a Reflex Save actually makes a lot of sense, and then armour can modify damage.
I'm of mixed feelings about Dead Levels. Put too much into a character class, and you get bogged down. Put in not enough, people will take something else.
I like the 'lump HP' at first level. Gives a nice buffer.
Overall, my take on this is 'interesting', but there was also, I feel, entirely too much on miniature rules in the rulebook.