There isn't a lot different schematically but there has been some changes in situational playcalling. For whatever reason DA was mixing a lot of man and pressure on early downs and on 3rd down--even 3rd and long--kinda easing back into zone. They've flipped the script a little and are also being a more creative and intentional with their pressures. The DL has stepped up against the run, and the pressure has been creeping up, but Cleveland in particular had a ton of dropbacks, so 3 sacks is a little less impressive.
Without having the film in front of me, what stuck out on some of these chunk plays through the passing game is that it's less a technical or matchup issue in coverage and more just blown coverage. This could be growing pains Koolaid, an abrupt switch back to the outside for Taylor (he's gotta get his sea legs back). I'm still pretty confident in those guys, but yeah, Stafford and Cupp/Puka are gonna try and test them.
My default as a DC is always to get after the QB rather than try to dedicate more resources to coverage. My philosophy is that coverage should be strategic--stemming alignment, not showing rotation too early, finding more than one way to double cover a player, using simulated pressures and just generally breaking tendencies. Yes, you can cloud things up for the QB by dropping 7 or 8 but it really doesn't matter if your pressure doesn't hit home--coverage sacks in zone are rare and more often than not one of those crafty receivers will find a window to settle in.