An offense's only advantage over defense is that they know what's coming while a defense doesn't. If you negate that singular advantage, defenses will always have the edge.
As it pertains to an OLine, I'd say that predictably is an absolutely brutal albatross for them. Aside from simply overloading the point of attack if you know what's coming, an opposing front 7 can also set up in gaps which complicate blocking assignments (from stacks to wide splits), come off the ball in a manner which makes them more difficult to engage (anchoring, pad level, shooting, etc), employ a variety of techniques to frustrate blocking schemes (from swims to rips to dips) and even exert less energy while the OLine has to work double time.
Even if they don't necessarily "play" any better this year, I'd think their efforts are still likely to lead to somewhat improved results.