I am not thrilled either for much the same reasons and I bought the iPad 3 at launch so I've been living with it about 3 months. I owned both iPad 1 and 2 as well. I can honestly say this is the first Apple product I have ever owned that I'm not completely thrilled with. I have a pink screen, it runs warm, has lower battery life, and takes forever (6+ hours!) to charge. Retina display is okay but not a game-changer as it was on the iPhone. I read all the time on it and for whatever reasons I'm not seeing this vast improvement in legibility and readability that others describe. Camera is better but impractical (awkward) to use on a large tablet so I just use my 4s for taking photos. Verizon LTE is wicked fast, I will say that is a major improvement. If I had it to do again, I would have held onto my iPad 2 with its long battery life and bright, beautiful screen and waited for iPad 4.
Most of your "reasons" sound more like excuses.
* The iPad 3 does get warm, but not hot. And it is far cooler than my netbook, and has been tested and proven not to be any hotter than most comparable tablets.
* Did you really expect the Retina display to jump out at you every day? You get used to it as the norm. Try going back to an older iPad and then see if the Retina doesn't make as much difference. Until you try that, you can't really judge the impact of the Retina.
* I could use my old iPad all day on one charge. I can use the new iPad all day on one charge. I've seen no signs whatsoever of a decrease in battery life, so I'm rather doubtful that that is a common issue.
None of your points seem like anything more than the whinings of someone who really didn't need an iPad.