Hey Jason, this is the first chance I have had to respond to your post. I respect your opinion but for me it's not a big deal and I'm happy to mix brands so long as they can work together very well or reasonably well. As Kat has mentioned, ED only really make armour and vehicles so if you like their stuff then there's no option but to use figures from other brands. The same can be said about Kronprinz, they only sell figures (with the exception of some motorbikes) and you would need to buy vehicles from other brands to go with their figures. I like highly detailed armour and vehicles but I'm not willing to pay through the roof to buy them anymore. That's what I like about ED, their vehicles and armour are not perfect but they are well detailed and at a good price point. The same can be said about JJD's armour although John's stuff is even better detailed but still at a good price point.
Anyway, like you say each of their own and so long as what you collect makes you happy is all that matters.
Tom