Dear vivek ji,
You have put the point quite clearly and actually it is bit difficult to debate about it coz many (esp. me)may not have realised of this approach before...
First i thought of why we have to go in opposite direction with our left hand relative to out right hand's motion which is going with the zodiac(form mesha to meena) but i think thats the way it should be coz with one hand we are going with the motion of raashis and with other hand(ANTI-clockwise) we r considering it flaws or characters in raashis which r opposite to the raashi our right hand is pointing......
One thought from where have you got onto this approach

actually its quite different way of understanding flaws of a raashi.....
When our both hand's fingers are on mesha it means all qualities of mesha are also it flaws....Does this means that mesha is harmful for itself....
some how decisions influnced by mesha raashi(be it lagna , moonsign ..7th house etc...)will(can) end be its own mis calculation also...
Regards,
Raman