It must be remembered that that this isn't anything even approaching modern style warfare. The very reason the Astartes were made was because the Emperor knew that war was going to be a lot more... WWI. If EC aproaches this from a PS2 angle it will go really quite badly. In ps2 (I'm assuming here.) the technology makes it possible to perform insane actions without consequences. Such as driving a column of armour into an enemy base without infantry support. There needs to be a lot (and I mean insane amounts) of lead flying around. The concept of warfare this game should be built around, should be taken from the baroque and grisly way it is waged in 40k. If that is not given the credence it deserves then it will not have the same feel to it as we want it to. So I quite agree with you there.