I have to agree with honourable tinkerers .
Putting as side the GW theme.
You've reached the point make or break point in a build. When your unsure what needs adding,or not.
You should go with the Mantra.
If you doubt your way,stop spray,and walk away!
(bit flowery I know but its good practice.)
In other words . You need to unify and consolidate your build. A coat of grey undercoat works well( for most people) as both black and white undercoat can obscure detail issue until you actually start your painting.
Then you leave the model alone ,work on something else. It'll do a little mental reboot and let you come back with a fresh pair of eyes
Right GW head back on. You don't really need to go Heath Robinson with the gothic detailing. Less is more,(plus the more you add the more there is to knock off)
Personally I'd go with a generic commandeered look concentrating on a set of interchangeable banners.Both commissars' and army specific guard banners
The odd purity seal wouldn't go amiss either. But that's as far as I'd go. But then I'm. Not making it.
Mark.