Agar was fortunate - but his batting has covered up the bowling - which has worked to Eng's advantage.
I take it Clarke and Lyon aren't particularly close...
Agar is naturally a better bowler as his flight is better and has more variation. His bowling in the second test was not as good as the first test. If he bowled more deliveries in the low 50mph mark and he'll be even better. He has a very good top spinner and got rid of Cook with one in the 1st test.
Not sure if you've seen Lyon bowl? Flat, no flight, no variation and not a lot of turn. Lyon is pretty similar to Hauritz actually, only more annoying... At any rate, Aussie batting is the weak point. So I can't see how it worked to Eng's advantage with Lyon not included, even if he was a better bowler (which he's not). And Lyon is not much good with the bat either... He definitely wouldn't be the leading Aussie run scorer like Agar is at the moment (which is pretty funny in itself)!