I think Djokovic fought very well since the return from the break, but I think that his "form" is a little bit overrated because he didn't really face many top players.
Cincinnati
Berankis 7-6, 6-4
Sandgren 6-2, 6-4
Struff 6-3, 6-1
Bautista Agut 4-6, 6-4, 7-6
Raonic 1-6, 6-3, 6-4
US Open
Dzumhur 6-1, 6-4, 6-1
Edmund 6-7, 6-3, 6-4, 6-2
Struff 6-3, 6-3, 6-1
Carreno Busta 5-6 disqualified
Rome
Caruso 6-3, 6-2
Krajinovic 7-6, 6-3
Koepfer 6-3, 4-6, 6-3
Ruud 7-5, 6-3
Schwartzman 7-5, 6-3
Sorry but I see nothing impressive with losing sets to the likes of Koepfer and Edmund, and then the 2 somewhat difficult players that he faced (Raonic and Bautista Agut) he almost lost to them. If he doesn't get easy opponents in the FO like he has so far he might be exposed.