DNDN seems pretty cool. I plan to playtest this as soon as I get my players signed up. That being said, I have some questions and observations about the current draft of the rules.
1) Does Skill Mastery grant a minimum total result of 10, or of 10 + modifiers?
2) Searing Light seems way overpowered when compared to, say, Burning Hands. Is this supposed to be a 2nd level spell? Its power level seems more on par with Arc Lightning.
3) The spells section mentions spells being prepared with higher level slots, and yet none of the spells in the playtest have this feature. Is this an obsolete mechanic left over from a previous draft?
4) Magic Missle seems overpowered at high level when compared to Shocking Grasp. Perhaps the additional missles could only be granted if the spell is prepared with a higher level slot, like 1st granting two missles and 2nd granting four. This assumes that (3) above is negative.
5) Why is ringmail more expensive than studded? Do shields affect stealth? Can shields be used to bash? Is light armor too good? For example, the cleric of Pelor would be better served by wearing studded, as his AC would remain the same and he would no longer be disadvantaged on stealth contests.
(An aside: will there be masterwork armor or shields?)
6) Some monsters are listed as wielding weapons that do different damage or are wielded differently than is listed in the "How to Play" guide. For example, bugbears use morningstars that are one handed and do 2d4, and kobolds throw daggers that use their STR instead of their DEX. Is this a monster creation thing, where monsters use different rules than characters? Or is this an error in the Bestiary?
7) Can the cleric of Pelor use shields without penalty? What about the rogue?
8) Lance vs longspear: the damage between these two weapons seems disproportionate.
9) What's the point in separating heavy weapons from martial weapons, since the only class proficient with martial weapons is also proficient with heavy weapons?
10) What is meant by the phrase "does not grant a bonus on the attack roll"? Does this mean that the attack is a straight d20 with no bonuses? Perhaps a better option would be to allow improvised weapons to be used with the full attack bonus but instead cause the attacker to be at disadvantage. That way a hardened warrior would be significantly more dangerous with his frying pan than an anemic wizard.