User blog comment:B214/Volume 22 spoilers/@comment-82.48.158.172-20161109231053/@comment-30289101-20161112204549

A tactitician is exactly the kind of person that WOULD trade a piece; assuming a better piece is found. Meaning I can only see her giving Issei a piece if he or she finds someone who's a better fit, which I really doubt. Those additions to her team were so she can fill out her roster, not give to Issie. Same for the new members of Rias team (I'm sure Valerie is permanent, and I doubt black is but Lint can go either way)

And Fafnir was sealed into a an artificial sacred gear, so we know it's possible. The only potential issue being that perhaps Azazel is the only one capable of doing it. The real issue with this is that her Sacred Gear already has a fairy residing within in and havng 2 beings in 1 is unprecedented and probably not good, otherwise I imagine Azazel would have done so.