Jai,
Superb song from Shiva Sainya.
I written about this aspect (making a revolutionary song using synth) earlier. I think this is one of Raja's great experimentation. I think people don't looks at these songs that way because of the initial feeling you spoke about. That the song would be better off with the real instruments and without the synth. But once you remove that block you can clearly see what Raja has done with synth is nothing short of extraordinary in such cases. I claim that Raja has a much better hang on synth based on his Malayalam work and works in such revolutionary genres.
Two other songs which will support this thesis of mine are 'ulagame manidhanai' from Ivan. Excellent piece of work with synth being used extensively. The other one where I thought he achieved perfection in this regard was, 'rama rajyam' from 'Gayam 2'. The melodies pushed this song behind but it is a number which I was fascinated with and wrote about it in Gayam 2 review.
Here is the link to the 'Ivan' song. Excellent chorus, drumming ensuring high energy. And what an outstanding tune he has imagined. The tune itself carries so much energy with it.
http://www.thiraipaadal.com/tpplayer...255%27&lang=en
Here is the link to the 'Gayam 2' song.
http://www.youtube.com/watch?v=4VTnCIfPmy8
What surprises me in this song is the drumming. In the pallavi it is almost jazz like complex rhythm. In the charanam it is free flowing instead of being menacing !! Yet the song achieves the intended effect.