Legendary Ike won and now I have a problem

Hello. Its not a real problem but I dont know what should I do with the new NEUTRAL Ike we will get on 28th.

I have already a Legendary Ike who is +DEFENSE,-Attack.
That means he reaches 38 defenese before any buff of the team. Thats amazing he can tank everything easily and with his A skill + Distant Defense he has an incredible bulk. However, he has "only" 49 attack with the weapon (I guess thats enough high, or maybe not..).

WHAT SHOULD I DO? KEEP THE NEW ONE? OR +DEFENSE?
Should I give his A to any other unit? Who would need it? Then what Ike should I keep?