Fed in some instances was playing really well though. Madrid 2008, Toronto 2010 and Shanghai 2010 are some examples. He played well in all 3 events and Murray managed to beat him in the end as those were all semis and finals.I never got why this was a big deal. Fed was lollygagging in smaller events from 04-06 too for the most part unless it was a big match or a late round against a good opponent. Watch him, he's not moving his feet at the same intensity, barely bending his knees, etc. Clear difference between Fed in the big matches and any other Fed for pretty much any version of Fed before late 11/2012 when he knew he had to go all out in the small events to get #1 and keep his ranking cause he couldn't count on 4 slam finals a year or clay for points.
Sure, Fed starting in 08's half baked level was no longer good enough to beat Murray, but he lost to tons of people outside slams in 08-10, not just Murray.
At the end of the day Murray has barely troubled the late prime/post prime Fed at big events when Fed wasn't seriously physically shot. That's all there is to it, it is what it is. Peak for peak he'd probably be even less of a problem than Hewitt was because Murray has more random mental fluctuations, isn't as quick around the court, and is probably even easier to coax short balls out of. If Murray had one of his good serving days he'd pose some more issues, but who knows how often that would be and Fed returned way better in those days too. The 2nd serve would be a much bigger liability than against the 08-12 mid court chip returnerer too.
Shanghai 2010 was the most shocking as Fed was in great form not even dropping a set before the final and Murray comes out there and trounces him.