I am giving myself reasons to stil belive in the plot. 
Whereas things do not look out of the blue (suvarna and tripurari's affair was shown quite in advance, durga saving dhani in market, durga being burnt and dhani helping her in return - this equation eventually being used by Dashrath for triggering tripurari and dhani wedding was also a gradual thing)... but this still makes you think could this really have been the plot the writters actually had in mind when they began the show?
Things that are currently making me watch the show everyday are that they have kept a really good pace to the story telling, so much so that things and charachters till this stage arent looking out of space, that Mishal is so talented, that Eisha has a spark, that a mild viplav and dhani vibe is there even in story arcs in which they arent together, that the supporting cast is fine and a complete thing together, that they are getting in cameos to address further story (this time probably something more humble and belivable than the Tulsi stint)...
I still wish to be patient with the show, hoping that the bigger the mess this wedding fiasco is the bigger the wound dhani would have (the second time)... this would make her still more scared and denial when viplav would confess his love, beliving truely that she herself is jinxed. And this would ask Viplav to try even harder... thats when "tum bhagwan se dua maang rahi ho aur hum tumhe" probably make the most sense...
Good luck IKRS, hoping there still wouldn't be an irreversable damage to the story...