They shouldn't give Heyman another new client,a new client would just take the spot light from Axel.
If they intend on giving Heyman a new client then they should pick a guy in NXT who has the in-ring skills but lacks the mic skills,a guy like Ohno. Ohno would actually be the most logical choice,Heyman could talk him up in promos saying that Ohno has years of expierience and can knock anyone out with his elbow. Having Ohno as a Heyman guy could also make for one hell of a storyline if he were to turn on Heyman and feud with Axel for the I.C title. I'd love to see an Ohno/Axel feud.