I disagree. You should pick your best players as often as possible and try to win every game. This kind of thinking has emerged due to the World Cup, and I admit that I once kind of thought in a similar manner, but you've got to realize two things:
1) We're not going to win a World Cup. If we could win 2 6 Nations Championships in a four year period and have a shitty World Cup that'd be awesome. Much better than getting to a World Cup Semi Final in any case.
2) Players need less time to acclimatize than people make out. How long did it take Tim Visser to look good on the international stage. Same for people like Tuilagi, North, and many more.
All of that said, ROG is clearly the wrong choice. Not because he's older, but because he's awful. Madigan is the form player. He should get picked.