^ Wait, you never know. Maybe the new change is that opposing SF's is the position most affected by the SB increased effectiveness in terms of lower conversion rate when driving. In that case the small cost of IS for SF's is balanced by the fact that it is less effective against certain tactics.
That's assuming SF's are playing SF on offense, though, but it would have an impact regardless.
"Air is beautiful, yet you cannot see it. It's soft, yet you cannot touch it. Air is a little like my brain." - Jean-Claude Van Damme