You are confused my friend. The 13 inch doesn't have most of those options because of the form factor or design constraints. Not because they dont want to put them in. Some they could. Most they cannot. That distinction is going away on the 2012 models. The 13 inch should have a retina display and quad core avail. to it like its larger brother.
I own both, actually all three at my business. I can use whichever i want. The difference isn't only price, for some yes, for some no. A current gen 2.8 i7 in the 13 will be just as fast or faster in single and dual threaded tasks than the 2.2 15. Underpowered I think not.
The 13 2.8 i7 is faster than your 15 MBP. 2010 model right? Is that why you're mad? Lol
The 13 is the bigger bang for your buck. Espicially the base machine. And on the 2012 models all will have retina displays. The 13 2012 models will have the same features and cpu options as the 15 MBP since the 13 inch will have quad core option as well. What you will not see is a discrete GPU. Due to thermal constraints, nothing else.