Having ET back there is also going to force QBs to hold onto the longer as they question whether a throw is a good idea or not with ET in the vicinity.
But yeah, losing Suggs and ZDS is overblown. Suggs was still solid last year and we'll miss his leadership, but he's been on a downward trend. McPhee is a clear upgrade for ZDS as long as he can stay healthy. Ray should be a solid contributor, at the very least, and could potentially break out (this is still a former 1st round pick that we're talking about). Timmy should hopefully be able to stay on the field this year and, if he does, he should finally be able to rack up some stats.