We now have evidence that the Russians are modifying their cruise missiles to accommodate conventional warheads. (paid subscription required)

You can notice on both the Kazoo (top) and the Kent, forward surfaces have been added, probably to accommodate a center of gravity that has moved forward due to a heaver conventional warhead replacing the previous nuclear payload.

Additionally, the Kazoo appears to have some electro-optical sensors, which are likely used to improve terminal accuracy, reported to be 2-5 meters.

Considering their experience in Georgia, where they aircraft to anti-aircraft systems that they had designed, the renewed focus on stand off weaponry is not a surprise.