You've said that, but you're still not correct.
The FWD Civic is trying to put 300hp through two contact patches. The LSD does make sure the inside wheel doesn't spin uselessly, but it's still going to be trying to cope with 300hp and the lateral forces associated with steering. The RevoKnuckle isn't going to do anything to ameliorate that. The AWD competition has much less for the front wheels to cope with.
The electric steering in the Civic has almost as much to do with the lack of torque steer as the RevoKnuckle. It's programmed to offset the torque applied to the steering rack due to acceleration. The Revoknuckle equipped fwd Focus RS did that as well, but it was the first generation of the technology, and not quite as effective.
Anyone tracking the Focus RS should be installing the available Quaife LSD. Tracking it is going to void the warranty, might as well do the upgrade.