I think the question should actually come down to why you took the photo in the first place. If it was to get a perfect photo with perfect light and structure then you need something better. If you took a photo to create a memory then I think the things you are complaining about are fairly irrelevant as that is a good photo. 
A point and shoot just cannot take as technically good a photo as a DSLR, the lens and sensor are too small, don't allow enough light in and therefore need lots of processing in the camera to produce the photos. If you get good lenses for the DSLR then the gap will be even greater. With L glass on a 350D I can take beautiful photos but unless I get the subject and composition right they still don't mean much. And there are now much better cameras around. 
One problem is though that a DSLR and L glass is a heavy package to carry around and you may miss some things that you would catch with a lighter, smaller point and shoot. 60D is a large camera, 550D is lighter and easier to use, full frame like 7D are really big if you are used to a point and shoot.
TimJ.
				
			 
			
		 
			
				
			
				
			
			
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Clancy - 1978 Series III SWB Game.
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