Fed AO 08/11 are better than 17/18 by a full tier and in the same tier as AO 12. Not only did we disagree in the past that AO 11 = AO 12, but a full tier is honestly ridiculous.
There is no way he needs 5 sets to beat either of Nishikori/Stan/Ned/Cilic with his 08/11 game. Maybe early in the tournament, but definitely not past the QF.
I also don't see why Novak's AO 23 is not in the same tier with AO 20 and AO 21. He pretty much cruised through and bar the Dimitrov match actually played well 6 rounds of the tournament.
I am considering level for tournament (with more emphasis on later rounds), but I don't completely throw away early round matches. especially if they go 10-8 in the 5th set vs Tipsy or like 5-setter vs Simon in AO 11+robredo meh match in AO 11. Good level in AO 11, but should've taken a set. A little lesser level in AO 08, but again should've taken a set.
Federer cruised through delpo, tomic, karlovic in AO 12.
So overall AO 12 is a tier above AO 08/11. even if AO 12 semi is not that much better than either AO 11 or AO 08 semi (it is clearly better, but not much better)
AO 12 would be a tier above AO 17/AO 18 if played on the same courts, but they weren't. That's why I mentioned the cavaet in brackets.
If AO 12 nadal had to play AO 17/18 fed on the faster courts in 17 or 18, he'd need a pretty competitive 4-setter to beat that fed.
Also Nishi was a 4R match, not QF-F match.
definitely can see nadal/stan of AO 17 going 5 vs fed of AO 08/11 given those courts and fed's inconsistency, 11 even more so.
Cilic hitting of course was aided by the faster court in AO 18, so not as sold on that one.
Maybe you can say tier 3.5 instead of tier 4 for fed in AO 08/11, but actual performance given those specific courts, I know I'm taking AO 17/18 over AO 08/11
I do think AO 23 djoko was declined from AO 20/AO 21 semi final level, but given the absolute lacklusture competition, he wasn't exposed as much. So you could say based on what actually happened, should be on the same tier.
And if Tpas had held his head, he would have taken the 2nd set TB. djoko played so mediocre in the TB, but tpas was like I'm gonna play the worst TB ever.