I went to Payoneer with Media.net too. They have been better than the original system Media.net had in place. Payments on time and accurate. There is a small transfer fee for each payment but it's MUCH smaller than the original system charged.
The AdSense payment system is pretty solid, in my experience, with ample methods available. I doubt they'll ever offer payments through an unnecessary third party, just like they don't send money to PayPal accounts (even though the demand is probably there).