I have a couple observations. (I'm new to this board and to forums in general, so deepest apologies if I commit some kind of breach of etiquette.)
1) Spirit Shaman -- It seems to me that Druid's game-breaking potential comes from wild shaping into absurd things and then buffing itself and its Animal Companion, plus using creative wild shapes to solve other potential problems. The extra versatility of its spells is just sauce for the goods. If you take away Wild Shape and Animal Companion, is it possible to break the game on its spells alone? I'm not sure that it is, therefore Spirit Shaman ought to be T3 (High versatility, low abusability). (If it
is possible to break the game on a druid's spells alone, I'm all ears as to how
)
2) Warlock -- nobody seems to disagree that it's T4. Yet, like an Artificer, it can fake any spell for purposes of making magical items with a UMD check. A UMD check of 24 gives it the ability to fake 9th-level spells, and RAW doesn't provide any limit on how early it can do this (that I can see, bearing in mind that it doesn't get the ability to do this at all until Level 12). Now, it clearly isn't anything like an Artificer, but the potential for some limited game-breaking abuse is basically right in the open. So why would it not be T2?
Just looking for insight.