I'm a convert from classic, myself and in the last six months C2 has really impressed, I am currently doing some tests with a 32000 wide layout granted a sparse backdrop but with 500-600 objects running around all shooting, moving and calculating, I get a very solid 60 FPS with node, compared to 30 fps in firefox and approx 50-60 with chrome...
The fact that C2 is still developed and the stable editor more than make up for any features not yet implemented into C2...