Even having lost McCoy I think the DL is simply better than last year.
I think 2020 Lawrence will be better than 2019 Lawrence. Even though he's a returning player, you cannot discount that he just had a down year. I think Everson Griffen will be better than Robert Quinn. Even if he doesn't put up 11 sacks, Quinn missed games and was not a complete player, and kinda would have a sack and then disappear. Griffen I think impacts the game way more often, and hopefully Lawrence's production increase will make up for the raw sack number discrepancy (ie, if Griffen only has 8 instead of 11, hopefully Lawrence has 8 instead of 5).
Poe is better than Woods who started at 1T for us last year. Woods is now a backup.
And I think some combination of Aldon Smith on pass rushing downs plus Gallimore and a healthy Crawford are at least the equal of Maliek Collins. Probably significantly more, frankly.
Our DT rotation last year was basically Collins, Woods, and Christian Covington (Trysten Hill gave us zero, nothing). Yeesh.
This year it's Poe, Woods, Gallimore, Crawford, a percentage of Aldon Smith, and whatever Hill gives us. Even with McCoy out that's way better.
And DE also should be better. Last year our rotation was Tank Lawrence in a down year, Robert Quinn, Dorance Armstrong, Kerry Hyder and Michael Bennett. This year it's hopefully rebounded Tank Lawrence, Everson Griffen, Aldon Smith, Bradley Anae, Dorance Armstrong, and maybe even Randy Gregory.