For PvP1, I would suggest -6 Shrieker, -1 Stone Dragon, -2 Stone Skin, -6 Stone Pillar... +6 Graboid (quicker play than Shrieker and can be left burrowed if opp is causing CC havoc), +5 Time Pendulum (help go Graboid-to-Shrieker against early Dev/minor denial AND allow for RT), +4 Reverse Time (can be added without slowing your own rush much at all and will decimate Immorush and creature-combo decks).
Half the deck seems like a lot to change, but really PvP1 is a very different animal than AI3... I'm sure the deck you posted is just fine for AI3, though.