I can definitely appreciate how discouraged you must feel, looking at the situation through your eyes. But we can see a difference in the before and after pictures...maybe not the difference that you anticipated, but the rest of us looking at it see the "after" picture as a clear improvement.
But, more than that, you stopped drinking, smoking and eating unhealthy in one year! That's really, really commendable. A lot of people never get control of these vices and you have a year of great health under your belt.
Maybe, mentally, you should look at the last year as "getting into the groove". You're a hundred times healthier and have made it a real lifestyle; you really mastered fitness on the inside. Maybe this coming year can be the year you work intensely on the outside of your body. This time next year you could be looking a bit more defined and bigger (if that's what you're aiming for).
You should be really proud. 99% of people can't stop drinking, smoking and eating crap and maintain it for a year. Honestly, anything on top of that is a bonus. You've got a great jumping off point for tweaking the outside this coming year.
Also, no one else has asked but...how do you go about increasing your weight (lifting, that is)? Does the Ripptoe program tell you when/where/how to add weight? Because that seems to me like the most obvious thing. The diet is great, but if you want to put on muscle you're going to have to steadily use more and more weight. Maybe do some internet research on when it's appropriate to bump up your weight and give it a try for a few months.