This is a great list! Thanks for posting (and updating)!
I'm gonna throw my opinion out there though that I think it's a bit unfair to put Core Rogue and Monk down on Tier 6 with the NPC classes. The way I understand it, Tier 6 is reserved for classes that simply don't work as intended because they are poorly written, or are NPC classes that aren't supposed to be for players to use. Swashbuckler is more of a Tier 6 in my mind, as it's a one-trick pony with a crappy trick.
Tier 6: Not even capable of shining in their own area of expertise. DMs will need to work hard to make encounters that this sort of character can contribute in with their mechanical abilities. Will often feel worthless unless the character is seriously powergamed beyond belief, and even then won't be terribly impressive. Needs to fight enemies of lower than normal CR. Class is often completely unsynergized or with almost no abilities of merit. Avoid allowing PCs to play these characters.
Rogue, Vanilla Monk, Unchained Monk (if no TWF), Aristocrat, Expert, Warrior, Commoner, Vow of Poverty Monk
(Emphasis mine). Rogue, especially, is getting a bad rep here. In 3.5 the Rogue was solidly Tier 4 because it was very versatile and capable of contributing SOMETHING, most of the time. The skill system revamp may have made the skill-monkey role less usefull, but Rogues benefit too by being able to spread their skills even further. In Pathfinder it's still the same old Rogue. Can often shine outside of combat, especially in a low-magic campaign, and can do OK damage in certain situations with sneak attack. Also has UMD on its class list. A Rogue can beat an Expert or Aristocrat or Commoner at its own game without even trying, and a decently optimized Rogue can often out-damage a Warrior with Sneak Attack. As far as synergy goes, Rogues are certainly MAD, but most builds tend to focus Dex above others. A Rogue
wants Intelligence and Charisma, but doesn't really need them to function. Nor Wisdom, they just can't dump it. Plenty of builds find a way to make Strength irrelevant. I think all that puts them solidly in Tier 5. Unchained Rogue and Ninja are definitely better, but not a whole tier better. Unchained Rogue is basically the same with a few bonus feats. Ninja is a Rogue crossed with an even worse class, which somehow manages to synergetically shine a little bit in comparison. Neither can do more things than a Core Rogue, they're just slightly better at a few of those things.
Tier 5: Capable of doing only one thing, and not necessarily all that well, or so unfocused that they have trouble mastering anything, and in many types of encounters the character cannot contribute. In some cases, can do one thing very well, but that one thing is very often not needed. Has trouble shining in any encounter unless the encounter matches their strengths. DMs may have to work to avoid the player feeling that their character is worthless unless the entire party is Tier 4 and below. Characters in this tier will often feel like one trick ponies if they do well, or just feel like they have no tricks at all if they build the class poorly.
I think that description sums up the Rogue (and all his variants) quite nicely. He can scout pretty well, but not as good as a Wildshaped Druid. He can find and disable traps really well, but so can others, and that ability is often not needed. He's got social skills, but the Bard or other Charisma class will outshine him. He's got UMD, but UMD isn't nearly as good as real spellcasting. He can have a good damage output with Sneak Attack, but it's very situational.
The Monk I'd say is a very low Tier 5, but still 5. Among the uninitiated Monk is a pretty popular class. I've played with a lot of Monks, and in an unoptimized, un-min-maxed party at low levels, the Monk generally proves to be useful as a secondary fighter and that athletic guy with no Armor Check Penalty who can hold one end of a rope and make a jump, climb, or swim check that the rest of the party would fail miserably. A decently optimized Monk should be able to outfight a Warrior 80% of the time while being more versatile as a scout or grappler or what-have-you on the side. It's not much, but it's both more powerful and versatile than an NPC class.
