Lastly I'll add that IMO safeties replacing ILBs is coming. It's an inevitable trend for a couple reasons...
1. Continued refinement of passing games and rules to favor them.
2. Difficulty in finding ILBs who move the needle.
Every year in the draft there's a guy or three who have the mix of abilities who project to potentially being an ILB who can cover or fill downhill vs the run. But after them it's JAG city with a ton of two down types and oversized safeties who will probably still suck at run support compared to a classic ILB. There just aren't enough of those guys to go around so that reinforces the schematic side which, IMO, will also trend that way.