Miller playing Scrum half? I can't remember that happening, anyone else?
I think Wasps are a long way from having a fully rotatable squad in certain positions.
I would also be very surprised if Umaga was the type of player to coast or "take his foot off the pedal" He's young, was on a hot streak of form, and is playing without fear. He did do some very good things last night, its a shame he made a few mistakes too. I guess you can't have one without sometimes having the other.
As a side note, and not having a pop at you here Silvershire, I think people tend to be critical of "flair" players when they have a bad game and accuse them of not not trying hard enough, or having their head turned by media attention or get told they need to "concentrate on their game". Cips suffered form that a lot and I hope Umaga doesn't end up with the same problem.