Gennett is more likely a non-tender candidate than a trade candidate. Villar is a pretty terrible defender at SS, might be at 3B too. He's certainly not someone you willingly move to the most important defensive position on the diamond. I'd definitely move Villar over Arcia and I'd shop Villar pretty aggressively this offseason. Unless he can keep a .400 BABIP year after year, which seems highly unlikely, he's going to regress.