User blog comment:B214/Question & Answers 5/@comment-98.227.238.52-20150513171226/@comment-3965848-20150513225350

There's also no point in fusing the SG's since a part of DD is already fused with BG and Dividing Gear is nolonger an issue since Issei can't use it anymore, now he handles better with the Wyverns.

And it's not just one of Albion's powers, Issei can Divide and Steal power and also Reflect, that's pretty much all of it, which is more than what Vali currently has since he can't use Reflect.