Yeah, basically here's the breakdown:
ITS ALL THE SAME AS BEFORE, native banners are native banners and banner pack users see banner pack banners.
** EXCEPT **
There are NEW, exclusive slots open now that we can't use, unless you get an exclusive banner slot through the auction. Then you can upload your banner and ONLY your clan can use that SLOT.
(Remember, its the SLOT, not the banner image that is used during banner balance, of course).
At least that's how I understand it at this point.
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The weird thing from this is that, lets say we are using the banner pack and we are using the NH banner or something....now lets say NH gets an exclusive banner slot and they all use it. You could still use the NH banner from the banner pack and you would APPEAR to have the same banner as them but it would NOT BALANCE you with them since its a different slot, just same image (assuming they used the same banner image for their exclusive banner as their bannerpack one).
So you could have people using the same looking banner on opposite teams....
Not a big deal, but weird.
Not entirely sure what was gained by the exclusive banner slots....but there may be more to come.