...and to think that after 3rd edition, they tried to minimize 'little fiddily bits' of wargear, so that people didn't have to know what each tiny bit on the character did ("My Terminator Honors give me +1 Attack"). Now, all the extra rules aren't even associated with the model!
I'm still not sure how it is confusing to require upgrades to be shown on the model, but not confusing at all when the exact same model and unit has different profiles and rules based on how you selected it.
Don't get me wrong. I like the idea of Formations and Detachments, but I think that special rules should be somehow obvious to the opposing player. The Green Tide is a good example. It gives you special rules, but you also field the units differently. I think it would be better if that was the ONLY kind of special rules this stuff got. I still think its weird and confusing that, for example, Battlewagons can scout, if you take 5 of them.

The rule is certainly useful, but it don't make no sense!