The only criticism that was done was the 7 year leap just to extend the show but even the story after the leap has absolutely been great and therefore there should not be any more criticism for that.
One hiccup in this serial was Karan, the illegitimate child of Inderjeet Rajvansh. That was not required...such a part did not suit bidaai.
Definitely RS makes great serials and he should be respected as he did not betray his audience by shifting bidaai to an afternoon slot and then stretching it unnecessarily. He decided to give it a proper ending in the usual timeslot even when the trp of the serial is good.
( do all of u remember kyunki never ended...its like betraying the audience .............similarly kayamath was shifted to 12pm slot.....nobody followed that slot........kasturi was shifted to 7pm saturdays and then 7am weekdays......nobody followed that)