No one is trying to suggest momentarily that Afridi is not important. I was the first person to be surprised when Pakistan played around with him in the first years of this millennium. Afridi has always in my mind been a very strong batsman and one I thoroughly enjoy watching. He is my favorite non-Indian cricketer. I was very disappointed when Pakistan dropped him for the team and when they had him in the team and sent him in at number 9. A complete waste of talent.
Match-winners: Afridi is as good as they come. He scores his runs quickly, lifts the spirit of the team and can change the state of the match within a few balls. He can also put in a good bowling spell or two and thus aid in that effect too. He is a great player. The only thing lacking, of course, is consistency. However, he has performed very consistently in this tour. This may be a career-changing tour for him, like Hayden's 2001 tour of India was.
Now addressing the India + Sehwag problem. Sehwag cannot be blamed as a non match-winner if his team just falls down like a pack of cards when he performs. He bats so well that his whole team is in awe of him. Or whatever happens to them they come in and gift their wickets away. It's a tough problem that needs to be addressed and solved. If Sehwag can notch up any sort of consistency in ODI cricket and the rest of India's batsmen can also put in decent efforts, half the deal will be done (batting). But the bigger reason why Sehwag's efforts aren't rewarded with victories is that India's bowling attack lacks teeth. Pathan seemed to have changed that but now he is as bland as mashed potatoes.
As for your comments regarding Sehwag's shot-making, I give you a chance to take it back. Apart from the short-ball on the stumps, Sehwag can get rid of any ball to the boundary. He has beautiful drives--back foot and front foot. His cutting is unparalleled. He can uppercut the ball for six. He can sweep the ball for six. He can loft the ball for six. He just applies himself more which is his style--Afridi's style is bang, bang, bang (6-6-oops). Both succeed at what they do so let's just sit back and enjoy the show.
EDIT: The above post was in response to durrani's post