I read his additional article on Lords of War, and it's something I agree with entirely. Only a small number of available Lords of War are actually balanced for competetive play, especially when you take Ignores Cover into account. I've already heard a few people mentioning bringing Baneblades and Warhound Titans and it concerns me. I want to play a fun army, not an army built specifically to deal with Lords of War. But at least narrowing them down until the options remaining don't completely ruin most armies makes it possible to still have fun, and the Maelstrom of War missions means that Lords of War will suffer from lack of ability to run around getting objectives. (read: Tyranids have almost zero invuln saves, so S10 AP1 Ignores Cover 7" blast = complete wipe of nids)
Just my 2 cents