1) As far as I understand: It's a bug.
2) Dragon Blaze I can support, mainly because Red Prince for example is a warrior.
3) Stats at level 7:
Life / Armor / Magic Armor Class
408 / 264 / _34 Twohanded warrior
378 / 133 / 214 Dual wield warrior
278 / 114 / _61 Mage
296 / 118 / _16 Ranger
Those armors could have gotten tweaked, because at level 7 there are body pieces supporting over 100 armor/magic armor, we just did not care.
4) It is true, leveling skills just does not have the same effect like DOS, but on the other hand, the coste are the same and perhaps the total affect as well, just the costs per step are lower and so is the gain.
In DOS the costs were 1 -> 2 -> 3 -> 4 -> 5 summarizing into a total of 15, you just don't need to save 5 points for the last level up.
5) At some time in the EA, will they will offer a different style of skills and stats I heard. But otherwise most seem to share you opinion, high level skills need far to many slots.