I'd rather see Eastmond move to full back tbh. He's an electrifying runner, with great feet and causes defences problems when running the ball at them, but I haven't seen anything from him to suggest he has the ability to control a game and move his team around the field in an organised, effective manner. Play him at the back and he'll kill teams with his kick returns.
As for Tomkins, tonight was the first time I've seen him and he looked good. Tiny little bugger, with legs like match sticks, but he was targeted in defence and I don't think he missed a tackle all night. Wigan need to be careful with him though, especially at this stage of his career. Playing SL week in and week out will be tough for someone his size, so they'll need to watch him closely for any signs of tiredness and injury.