User blog comment:B214/Question & Answers 5/@comment-97.103.233.248-20150513024613/@comment-3965848-20150513055903

He would be able to steal power from enemy so it would easier to overpower them, well being him he would stuggle at first and wouldn't know how to fly.

In his fight with Vali, he might have a better chance at beating him (if he was better at using it) but I think Vali would still overpower him. Issei still couldn't stay in BB very long and out of desperation would probably take the jewel from Vali's armor again and have Ddraig boost ability.

His Trina forms would white and abilities would be slightly different.

Alhough, I think Rias (and maybe some members in her family) would prbably be animated with white hair, Great Red would be Great White.

But over all I think every thing just works better as it is now, like Issei going max boost at the end of season 2, sharing his power to his friends or Rias gaining Oppai Beam ect.