Yes? Is that the only way to judge a performance?
By his standards the UE count was quite high. There were a couple of lapses, in the first and third sets, where he dropped serve with some poor points in bunches. 55% first serves is not bad but could do with being 10% higher. Ace count was good, second serves generally were more effective. Returning was somewhat poor today by his standards and the passing shots were in and out.
I thought it was not too bad, plenty good enough for the calibre of opponent, but I didn't see too much today that will strike fear into the heart of the likes of Federer or Nadal. It was good enough - 3 rounds played, no sets dropped, adequate level of tennis to beat the opponent fairly comfortably. That's all that can be said at this point - he needs someone who will really push him to show us where he's really at.
The UE count was higher because he was more aggressive. Do you want him to be aggressive while still keeping his UE count in single digits? It's the differential that counts. Honestly, I think you try too hard to appear impartial sometimes and end up being needlessly critical. It's as though you fear being labelled a fanboy if you give Murray anything more than grudging praise.
I thought the performance was very good. Couple of lapses, sure. It happens in these matches. Tough to keep the adrenaline going when you're playing a guy like Serra. Then again, he has progressed more comfortably than the players you mentioned. The likes of Nadal and Federer have had more problems than Murray, so it's not like he is trembling at the thought of facing them either. I know an average performance when I see one. That was clearly a good day at the office.
And honestly, are you really holding out for Murray to serve at 65%? Murray does that once in a blue moon, so let's not get carried away. The only way he's getting 65% in is if he uses his slice serve more. He's too fond of the flat one, though.