I appreciate working the crowd is more important than doing a shitload of moves. However I'd say, for most, it's past how many moves Cena does (never really bothered me the number, just the believeability of them really) but the things he does soooooooo wrong... I'm talking about how he destroyed Nexus 7 on 1 within a few weeks (the week before he called them "unstoppable" too)....How he took 2 steel pipe shots from Miz and, within seconds, no sold them and chased Miz up the ramp (then showed no future pain to them again). 5 "moves of doom" I like because they give the match structure, but Super-No-Sell Cena deserves every bit of hatred he gets.
Oh, and whoever said his STF looks good? Really? Personally I think it looks like shit but, to Cena and WWE's credit, they've managed to get it over as a legit devastating finishing hold.
Yet, still, Cena can be carried and, in certain cases, lead a good match (especially against The Great Khali, to me that was Cena's best match ever)and I would take a Cena match every day of the week over a Diva's match (or a John Morrison match too)
You realize that 2 of the 3 things you mentioned were how he was booked right? Also, he doesn't "no sell" he sells that he's hurt. Watch him in a match where his leg was worked on. He'll hit the AA on one leg. He hits bursts of energy. It's not like he's Austin Aries after getting his leg worked, running up the turnbuckle, hitting a dive, then doing shit super fast the rest of the match. Cena's selling a lot more subtle than that.
Cena's problem, if you even call it that, is that he looks and acts exactly how people on here think that Vince McMahon golden boys act. So instead of thinking critically during Cena matches, they just say "aw what the fuck? Another comeback". When really, if you pay more attention, you can see the little things he does and why he's so over and so damn good at his job.
The no sell comeback is something every babyface ever has done. How can the Rock get his ass beat, then hit the people's elbow with all kinds of energy? That doesn't make any fucking sense either. However, just like Cena, Rock would sell in a very subtle way. He'd sell exhaustion on his facial expressions, then sort of grimmace when he did the arm thingy before he hits the ropes, like it hurt him to do it, but he did it for the fans. Cena does similar subtle selling. Cena, if his arm was getting worked, will wiggle his arm as he's getting up from a shoulder tackle, trying to get the blood flowing, his facial expressions show determination. He's not just no selling. He's showing that he's using adrenaline to fight through the pain.
How a move "looks" is entirely subjective. I think Punk's kicks, GTS, and flying clothesline look like shit. Punk isn't all that athletic and you can tell. He kinda stumbles on his kicks, he always looks like he's gonna fall off the top rope on his clothesline, and he doesn't seem like he could squat more than maybe 300 pounds because he looks like he struggles to lift everyone on his shoulders. HOWEVER, I don't care. In fact, it doesn't even bother me. In a real fight, nothing looks perfect. If every move in a pro wrestling match looks effortless and like a video game, it makes the match look fake. There is a gap on Cena during the STFU, but I think part of that is because he has huge fuckin forearms and if he did connect all the way up, most guys would probably end up passing out. If Punk's kicks were all done without him stumbling afterwards, it would look either like the other guy wasn't trying to get away, or that Punk wasn't kicking hard. If it didn't look like Punk struggled to get guys on his back, it would look like the other guy was helping him. If Punk didn't look like he was about to fall off the top of his springboard clothesline, it'd seem like he was 100% sure he was going to hit it and not taking a risk. Sometimes moves not looking perfect actually add to the story of a match.
Another great example of this is Swagger vs Riley. It took a few times for the gutwrench. However, how realistic is it to hit a gutwrench on a 275 pound man the first time? It's not, not even for a guy like Swagger.
I don't think Cena has been carried in 5 years. He understands crowd psychology too much. Maybe other guys have made a match more entertaining to a small portion of the audience because they do more highspots or moves percieved as "technical". But a guy like Cena who has been the most over guy in the world for most of the last 5 years doesn't get there without understanding his audience and working them.
Hogan use to go the other way and act as if every move was the most devastating it could be but no specific body part was ever injured, until he hulked up that is and then yes like Cena he no selled after the matches were done that is until around WrestleMania 6 when he sold the knee injury for most of the match and following the match. Gee that sounds familiar, took him 6 yrs to really sell an injured body part and Cena took about the same amount of time 
and jump around with certain parts of their body jiggling
If you actually prefer to watch John Cena instead of watching beautiful women then you are either under the age of 12 or you prefer the male sex...