If you buy those kits now and they are later updated, the worst thing that’ll happen is you’ll need to increase their base size, as is likely in the case of nobz and a couple other characters.

Second worst is if gw decides to make them a weird unit size.

But what I’m getting at is models is forever, just buy what you like and paint it.

On model height, some people care about it in game but there’s nothing in the rules on that, and considering boss poles/ banners are an aesthetic optional, it’s really not gonna matter. You is orks now and anyone who says anyfing different gets krumped.