In hindsight

[GeorgeIAF]

Dany should have went straight to KL the moment she arrived in Westeros, would have conquered it easily, and then help Jon in his war against the WW, the WW probably would have overran Winterfell but the whole world would have seen the horrors of the Army of the dead, Dany helping in the war against the dead and winning it would have been the hero of Westeros and loved by the smallfalk and almost all lords, sacrificing her army and dragons for the Realm.

Also, the plan to get that wight so Cersei will help in the war (even though her help wasnt needed) resulted in a loss of a dragon (a far more useful tool against NK), if Dany just stormed KL, they would have 3 dragons to fight the WW, also NK doesnt get his wight dragon and the Wall still stands.