Yeah the updated falcon escape and the now hilariously huge stormtrooper crowd is something that I actually miss in the original. As well as the impressively subtle update of the Mos Eisley reveal.
Other than that I can't really think of something, the CG effects aren't really that much of an improvement over the old ones. Instead of bad matting and perspective errors they just look video gamey. Tit for tat. None of the effects that truly needed updating have been so anyway. I still see an unprocessed lightsaber prop in ANH and I still see obviously composited pyrotechnics in ESB and I still see fighters popping out of nowehre in ROTJ, so whatever.