I get everyone's concerns over the d-line, but I don't think it'll doom our season. The offense could be great. The secondary should be excellent. Plenty of teams have won the Super Bowl with a below average d-line. You can't be great everywhere. Although the pass rush didn't improve on paper, I think the run defense got better.
I don't think its too unreasonable to think someone could break out as a pass rusher, whether that be Collier, Robinson, or Mayowa taking a Chris Clemons-like mid career leap and thriving in the LEO role. And Taylor might make an impact in the second half of the season. There are also some veteran options still available and we have cap space. All is not lost, IMO.