I'm gonna take the position that there is nothing to see here. He just faced the 2 best defenses in the NFL, and they exposed the fact that the weapons aren't great, and the OL is just ok.
Not worried about Daniels at all. Neither his play, nor his health. This is still a top-6 fantasy QB, and this is still a top-6 MVP candidate, and the clear rookie of the year.
It only gets easier/better from here.
		
		
	 
True but it’s a copycat league and he will see the same sort of D every week until  he can beat it.
		
 
		
	 
I don't think the type of defenses he's facing has mattered. Its the talent and coaching. No team has the DL the Steelers have, and no team has the secondary the Eagles have. These are also defenses being run by Mike Tomlin and Vic Fangio, 2 top defensive minds. Looking ahead at Washington's schedule the only matchup they really have to worry about is the rematch with Philly in week 16, and who knows how healthy either team will be in 5 weeks.
ETA: The biggest issue last night was none of the WRs were getting open. It was just Ertz and Ekeler. Combine that with the OL not doing well, and Daniels was fine last night. By no means was he the reason they lost.