well, my problem with your statement is that I truly hate Orton as a worker. His matches are all the same thing, and that same thing is WAY worse than Cena. Cena at least typically runs a nice 30 minute slugfest during PPVs, sells bumps perfectly, and where I disagree with your statement about orton, actually knows how to pace a match and make a comeback for the win. This is my biggest problem with orton, even beyond any sort of charisma he doesn't have in promos. Orton is horrible horrible horrible at pacing matches, and this championship match was THE EPITOME of it. Orton has only kept the belt using one of two ways: disqualification or RKO from nowhere after getting pounded on for 15 minutes straight. There is no pace to an Orton match. He sells ok enough for like 5-10 minutes, and then right before his opponent is about to put a finisher on him he flips around and does the RKO. HELL, it's why I HATE watching Orton championship matches. Because no matter what the match looks like, no matter how badly things look, you know that RKO could pop out at a moments notice and the match would go from orton being beat to him winning in like 1 second.
At least when Cena was champ, Cena knew how to sell a comeback. Knew how to sell the bumps, knew how to tell a story in the ring. Sure he doesn't have the biggest move set (whether because of lack of talent or limitations by creative it doesn't matter) and wins a lot more than most of us want to see... but in the ring actually playing out a match, I would have to say he's one of the best in the business right now. Sure I'd love to see some more moves, and sure I'd love to see him lose once in a while, but in the same boat I can honestly say I've enjoyed most of his matches, even the ones I groaned at, a hell of a lot more than most of the RAW title matches I've watched in the past 5 months.
As for heels putting over faces, I still say it's a lot more even (and really regardless) than you are stating. Yes we've had some popular faces that weren't tremendous workers, but it's much harder to be a heel and be a lousy worker than it is a face. Face's are primarily about charisma, getting the crowd fired up. Heels are about working. A heel with charisma but a poor worker is going to get SLAUGHTERED by the crowd (see Orton). Just like a face with no charisma and a good worker (Cody Rhodes for example) will likewise get ignored by the crowd. You have to look at what is the most important aspect of each side.
Heck, you could almost make a case for the charismatic talentless wrestler (which I don't agree cena is) bringing as much to a match overall as the working heel. it's two sides to the same equation.