Honest answer: It is hard to specifically why there is a lack of big plays this year. Most likely reasons:
1.) Teams game planned better to neutralize our pass rush,
2.) Scheme/play calls not allowing our DL to rush
3.) Injuries & Mario can be invisible at times; can also play half-hearted too.
Gilmore has played damn well and so has Darby both stopped many drives -result of scheme and letting them play - possibly. They are also talented....
Hughes when rushing the passer has been disruptive. Coaching should work to alleviate his PF penalties though...
DBs have dropped many possibly INTs, but that is why they are DBs and not WRs...
LBs scheme requires a lot of lateral movement, Brown and Nigel are not good East & West runners
Not everything is black and white... coaching has been lousy and the execution has been to. Hard to blame it all on the players. The answer is in the middle, but is skewed towards coaching more IMO
At the end of the day there are issues with both
The lack of using the middle of the field with the TE up the seam or slants is maddening. We have short dump offs or bombs, neither of which is sustainable. Assuming that our coaches know what they are doing; these aren't being called due to player skill limitations, or very conservative play calling to eliminate LB INTs (which could be lack of skill on TTs part)....