The top of the table side recorded a five-nil win at Huish Park, one which left the Hornets at the foot of the WSL 2 standings.
Even if the score-line didn't make for good reading, Rowson still feels there are positives to take from the game.
Yeovil show why they're leading the promotion charge
After keeping the Lady Glovers quiet for the opening 20 minutes, Watford gave way to a Sarah Wiltshere goal from a tap-in.
Rowson's words of "playing in patches" rang true, as they managed to keep out Yeovil until half-time approached; Nicola Cousins slotted home with a cool finish.
Atlanta Primus was the creator for the second, but was the scorer of the third just after the restart when Danielle Carlton sent her through on goal.
Helen Bleazard added a fourth before Wiltshere's striking instincts sealed her brace and a five-nil win. The hot-shot forward has 12 goals this season, the highest in the league.
Rowson keen for consistency
Speaking to the WSL website following the game, Rowson admitted she was "not happy" and that she is still searching "for a 90-minute performance".
The Watford boss added "it seemed like almost every time they attacked they scored", though she felt "there were a lot of errors" contributing to goals.
She says that is something they "need to work on" and it "should have been better than that".
Rowson explained, “We had really good patches, but you can’t have good patches in this league, if you are only good in patches you lose 5-0."
She added, “You have to play for 90 minutes, not just in parts of the game and that’s the most disappointing thing."
Rowson pointed to the 2-1 win over Everton, saying the team "know that [they] can do that", and that a performance like that would have secured "a better result" at Huish Park.