I wouldn't as Maia grapples with heavy condecorated BJJ dudes while teaching them ( Mir and Gonzaga, for Ex.) and got them really surprised. Shields has zero to offer to Maia on the mat. I consider this fight a downgrade for Maia, if it happens.
Down playing Shields level of BJJ. Not saying he's better than Maia, but it'd make a for a fun fight.
Even though im a fan of both guys I'd like to see Stun Gun and Shields fight