They’re attacking but not necessarily blitzing. First off, just moving to a 1 gap scheme will make a defense more attacking on principle ( with the requisite downside risk in the running game). But one thing Lazar pointed out was the number of simulated pressures through, essentially, forms of zone blitzes. One example given was the slot corner blitzing, the free safety then jumping to cover the slot receiver, the strong safety then jumping back to be the single high guy, and a defense end falling back and playing a hybrid safety/linebacker role.
Now Belichick would do this from time to time (they all do), but the Titans used this type of approach much more often than others, partly because of doing it on all 3 downs and not just 3rd down. So ultimately still only 4 rushers, but varied from where it comes from, and coming from a 1 gap scheme on all downs accelerating everything. To get this to work you’ll need more athletic players — likely a true sideline to sideline linebacker, more athletic defensive ends, and strong safeties that have range. Both Dugger’s and Peppers’ skill set might play out well here.