I don't know what to make of 4-way games, but I'll assume you're talking about a trend in your experience and not just a unique battle. It's good news - being in contention on the last turn is how it should be.

Knights in 1,000 point games are indicative of GW not quite fixing what I consider to have been a problem for some time now (not specific to 8th). I'm a lot happier with the Horus Heresy's old school force organization chart, 25% limit on Lords of War, and its 6th ed. holdover rule that it's mostly just Troops that score.