Board Thread:Questions and Answers/@comment-5522921-20160703051047/@comment-28961787-20160711234855

I'm going to go ahead and say yes as he only regenerated his Kagune as his arms and legs for speed purposes. While yes, he is capable of regenerating Limbs amongst other things extremely quickly, I'm assuming he just thought it'd be more convenient to just use his Kagune. However, this is rather advanced for him but we can just tack it off as being part of his mastery of his Kagune/Eto's influence. TLDR; Most likely yes.