BARD
1)
Distraction is a poor name for an ability that helps your comrades see illusions for what they are.
2)
Fascinate description starts off by stating that it's usable with music or poetics. However, the last sentence contradicts this by saying it can be used with any type of Perform.
3)
Deadly Performance, is broken as written. Save or die 20 times per day with a Perform based DC? This gets easily out of hand by stacking skill boosting feats, items and spells. Remember Forgotten Realms Spelldancer?
FIGHTER
Armor Mastery is sort of sudden on 19th level. A strong full blown ability that suits fighters, but some sort of progression for earlier levels would be nice. Maybe 1/- and 3/- included in the two earlier Armor Training improvements on levels 11 and 15?
PALADIN
Lay on Hands doesn't heal enough per single use to be useful in combat at higher levels (until you get Heal). Maybe paladins should get an ability to burn multiple uses of lay on hands at one go (full-round action?). Two on 6th lvl, three on 9th, etc... ? Heal would cost 6 uses with this progression, but it's still more hit points + extras than 6 uses of regular lay on hands.
ROGUE
1)
Trapfinding is a sacred cow ready for slaughter. Make Trapfinding a scaling bonus to Perception (like Trap Sense) when searching for Traps and adjust trap DCs accordingly. It's horribly stupid that a 1st level rogue can find a DC 21 trap, but a 20th level ranger with Perception +40 cannot. No matter how long the ranger searches for it!
2)
Skill Mastery should scale with permanent INT gains.