increments: re: the RAW vs. JPEG comparisons.
I'm presuming the JPEGs were all OOC. If I'm right about that I suspect there's a lot more detail to be got from them.
Also I'm pretty sure that the colour cast in the example shown could be removed.
While there are inherent limiting factors to processing JPEGs, you can vastly improve on a camera's OOC images. RAWs will be slightly better, but usually the differences are only apparent at quite large sizes (IMHO).
If you only view your images at a typical screen size, or upload to facebook etc. JPEGs are probably sufficient.
Of course the argument exists that if you're prepared to PP you might as well shoot RAW, but it's not mandatory and a lot of people do PP their JPEGs.
Lightroom processes jpegs exactly the same as raw, including WB slider. You can also process jpegs in ACR.