A primary feature of Bitcoin is that a payer can prove via the blockchain that a payment was sent. With all this CryptoNote shit ring signatures, how can I prove that I sent you Verde or Monero or Bytecoin or what in the event of a dispute?
Something similar was raised for BCN as well. I'd say one practical way to overcome this is through additional avenues of trust between yourself and the party you're sending to. I can see the full anonymous coins like DRK and BCN work best when they are transacted in person, so both parties can verify each other and walk away. Someone also raised the possibility of using darksend to send to a new wallet, then transact without darksend and do the same in reverse on the other side. Not sure whether this could apply for Verde as well.