Your banners have been fantastic this year, I have to say I would dislike the change you plan as you got it spot on just now. I'm hoping someone else feels similarly and can explain it better; the lined images was a masterstroke, it unites all the games, breaks up the more vibrant and as far as I'm aware - unique. With the STEAM text being replaced by the logo there is now the issue of the graphic clashing or bleeding as with GTA header quoted, the ceiling light in the shop being an example. It also tied the OP title and banner image together better I feel. Changing the colour scheme to blue is welcomed, blue is always nice - just wish the client respected that better. Although it may look better grey with the dark theme, the blue looks good for both board styles and as you said reflects the new Steam theme.
I can't imagine how much work - and not just time - that goes into each OP, I do appretiate it. Thank you.