Suresh: On chandrabimbthin, the rhythm progression is strange. Not sure if it's the movie situation. If you take it out (same for many of the new age hits), I'll like this song more - but still won't be able to call it fantastic.
On vakra ragas, riti gowla will be my counter example. He was the first one to try it and since then many are using it and consistently churning out hits. Similarly desh. I have loved almost every desh that IR has tuned. He has so much innate feel of the raga, all were top class from 'vizhiyil puthu' to 'oranjaaram' to 'ennai kavarnthizhjutha'. More importantly, not giving any sign of resemblance. So vakra nature is not strictly a discouraging factor IMO. Maybe he needs some special motivation..
KV: After reading your post, I feel like I can understand Kamalhassan interviews like a baby.. :D