I would use Revo for a small site for a somewhat different reason. Right now, when I’m making very ornate sites with lots of my favorite snippets and such, I use Evo because I know it better, and I know that all those apps will work.
Though Revo is clearly awesome, it’s still somewhat new, things there are still some things that are under development, and it might not yet have a particular function that I’m looking for. And yes, I know I can develop it myself - I just don’t have time to do that now.
But the basic Revo feature set is killer, and if I were making a very simple site right now, I’d go for it, and then later enjoy the many benefits that will accrue as Revo gets even better, and as Evo will eventually start to wane. I am hoping to find just the right project for that soon.
I wouldn’t worry at all about using only 5% of its power. I would argue that anyone using a CMS-related app, whether MODx Evo, Drupal, Expression Engine or whatever, is only using 5% of its power anyway.
