For me Tadic is part of a problem for us at the moment. What we lack at times and definitely lacked Sunday was pace in attack. Look at the problems Sadio caused them when he ran at them. Dusan is always holding the ball up, someone said about the time he has on the ball, great at times but it sure doesn't help our counter-attacking and you sometimes need that to get at teams who keep falling back into a defensive shape when given time. That's what was wrong against Swansea we had too much patience at times. Look at the guy who won it for them, what did he do? Ran at us. Hit the post once and scored, in a game we dominated.
Dusan needs to choose when to slow things down and when not to. Maybe his being on the right is part of the problem.