Yeah, I agree that, if Spencer comes back at anything near is previous level, and if Lawrence is back relatively quickly and overcomes the early injury, that's at least a serviceable lineup.
The reality is, we're a poor team in terms of DL talent this season no matter how we slice it. It's the weakest area of the team (the whole front 7, really). The bandaids and blue birds can help, if we get them. But our best bet is to have the relatively poor players we're going to be playing play as sound football as they possibly can, hope we get some help on the back end (where we do have some depth and some talent) in the form of some bought time and some contested turnovers, and then to play well offensively. I don't have even hopes for anything more than that. Maybe by the end of the season guys like Wilcox and Crawford and Lawrence and Claiborne start gelling and we finish on a relative high note. But there's a reason why we're not a realistic contender right now, and that reason is this DL. We didn't do enough to change that this offseason, so we're going to have to find other ways to be competitive.