Judging by that review I'm awaiting further expansions. There's the basis there for the game and special units, but I'd have preferred to see more paper tanks and the like.
Not to put down the game of course, they've included plenty of sci-fi stuff. My own Weird War tastes though are for the "what if" scenarios somewhat tied to reality.
Meanwhile I'm making armoured Panzer Grenadiers riding a Bradley style Panther APC. I may be a bit of a hypocrite.

(And yup, it aught to be easy enough to house rule some units based on existing rules)