Oda is just gonna let Maria and WsW show off against high tiers, like how he let Ulti and Sasaki show off against Luffy and Yamato. Also, look at the formula for every big arc. The weaker SHs get their fights set up first, then Zoro and Sanji get their fights set up, and then Luffy gets his fight set up last. So it would make sense for the weak and mid trios to have their fights set up before Jinbe gets his fight (against Jack) set up