That said, I largely agree with his commentary on Nekusar. Instead of a group slug accelerant, I've only ever seen it as a particularly obnoxious sort of Wheel/Megrim deck that quickly draws the ire of the table, and if you're fine being a professional nemesis and don't mind drawing that kind of hate, hey, go for it!
(otherwise, a high-sleed group slug take on it... might actually be fun, thinking about it, because you can do so much exploitation of that in Grixis colors)