This month and November are certainly wall-to-wall with about 27 steelbook releases in each !
OK, I get it, that you don't like this 'AP' 15th Anniversary Edition steelbook which is perfectly fine and if you wish to buy the Anniversary Edition on Amaray it is available for a penny or two under 9 quid on both Base and Amazon and also at Entertainment Store on the auction site ("Sold 22 - more than 10 available") and I've also seen a picture of this in a very smart BLACK AMARAY CASE but I imagine that was for the first pressing only and may need to be confirmed before making the purchase.
I don't expect the Kimchi editions of 'GBH' to have any effect on the U.K. edition as it is same steelbook after all - as far as I can tell - and IMO these particular Kimchis are pointless and hardly worth how ever much extra just for slipcovers and artcards and will probably be only bought by collectors of that company's product.
Those like myself who buy BLADE TRINITY will hope that the reason both Blades have been pushed forward to January 2016 is that BLADE itself will also be released at the same time to match the other two as the only country to have all three Blades out in steelbooks is Japan and that has got to change ASAP.
As a completist I'd buy 'Blade Trinity' to complete the 'Blade' steelbook set, even if that's the only reason for the purchase.