Napa lost out on the fight because of his British defeat. Whereas Maloney has put pressure on Munroe to vacate his 122 belt to give Booth his chance. Munroe will need his belt which he has defended well as insurance if he fails in his World shot/eliminator. Booth is naturally lighter and could do well at 118.
He will be looking at getting the Euro title at super-bantam once Munroe drops it, which he will be doing.
I'd prefer to see him at Bantam. I feel he's World class. Marsh has been struggling with the weight, I reckon Booth will stop him in about 9.