i dont agree with you but i think both the leads r doing a great job..
pallavi as gauri is getting better day by day and iqbal aka shiv no need to tell about his acting capability,he is too good..even he dont speak much ,his screen presence is enough to make a scene worth watching coz his eyes and facial expressions say it all...
as for beauty gauri has a natural one, the way she smiles,hersweet nature and the way she carries herself with such dignity its a plus point to her beauty..
we have seen iqbal in different roles as angad,shaurya and raghu ,all in different look.. in kaa if the story demands he must have this look a bit tanned and eye liner so i think its ok..he does look cute..thats my opinion shiv and gauri r perfect ...