Uncharted territory perhaps. Or they are scared how things will go on if everything b/w the leads is fine. Having more 'drama' often unimaginable is considered 'great'.
I have mentioned in the past that Bhavani should sign the divorce papers and throw it on his face... long before she was made to sign it. But is there a scope for continued drama there? Writers will have to cook up something and quite likely they will fail... may be one or two serials later the one who picks up the plot will be able to write it better.
No one wants to risk it... keep doing the tried and tested thing even if it is senseless and lame and if things go bad... have the audience to blame... not their creative brains.
about the ML and for the wedding track. 
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