I for one loved the Tasha/Worf dynamic and had the writing been a little sharper they could have been one of the best relationships in Trek.
The problem is that Worf has little enough to do as it is; they had two more bridge staff than stations (if you count Wesley).
Promoting LaForge to chief engineer cleared up one of those (he ended up in Engineering doing the job often enough during the first season anyways--!), but they still had three officers (Worf, Crusher, Data) for two stations (ops & conn). Getting rid of Tasha let them put Worf at her station, giving everyone their own place.