When Riker or Troi courted an alien-of-the-week it didn't affect their emotional bond. Their relationship gave TNG a lot of emotional resonance in retrospect. Watch The Price, A Matter of Perspective, Menage A Troi, The Loss, Violations, Conundrum, and Man of The People. When Worf and Troi got together it endangered the Riker-Troi relationship. The writers started to play on Riker's jealousy in All Good Things. I thought that was a blunder. I also thought bringing them together was a soap opera cliche. Besides the novelty of seeing them together what really did it add to the show? Every long running show couples some of the main cast because they have run out of creativity. Even Zack Morris and Lisa Turtle got together during the last season of Saved By The Bell. I thought that worked better than Worf and Troi. Worf had to lose some of his alien mystique before they would have even considered matching him with Troi.
I suppose I thought Riker-Troi was the soap opera cliche and Troi-Worf represented TPTB willing to move past it a bit.