True. And the trend is definitely going to continue to be towards more speed.
But one of the attractive elements of the 3-4--besides its versatility and unpredictability--is the field is split for the off ball types. This is why 3-4 defenses can go a little bigger and more physical at ILB and you have guys start for good defenses every year who would not be as good if they were playing MIKE in a 4-3. So it is valid to say the Rams have lacked physicality at ILB since the scheme change due to the quality of their ILBs.
The elite type ILBs who can do both at a high level (fill well vs the run or cover) are pretty rare and tend to go early in the draft. In this draft I think there are three of them (Simmons, Queen, Murray) not that they do both at an elite level right now but they project to possibly be that level of player off ball. Simmons is a freak, Queen and Murray are special not in size but instincts, closing speed, navigating traffic, etc. Not sure if any of them will make it to 52, maybe Queen will given the quality of this draft but I think for this season we're probably going to be subbing more than a defense like the Bears due to our lack of talent.