I don't get what you're saying here...
Are you saying we should use a 3-3-5 in passing situations or are you saying that we should make it more of a fixture on defense...Either way, I think I disagree with you...
Here's why:
Cushing will be on the field regardless...I think that for the most part I'd rather have Cushing back in covg than Diles...
If you are constantly using Cushing as a pass rusher then you lose what he brings on the back end of the defense...Which is pretty good pass coverage, and the ability to close on ball carriers and make a tackle if a catch is made...
I think that if anything, we can mix in some true 3-4 sometimes and bring in Bentley, or Sharpton to get them involved....
I am not against using the 3-3-5 alignment you listed as a wrinkle, but I don't think that it would be good to use as any kind of base defense...
Hell I think we could mix in all kind of wrinkles if the defense shows they are mature enough to handle it...