All I've been saying is that what we are doing right now is hurting Shattenkirk's trade value (and Smith's, but that's a lot less important).
But OK, let's say two games isn't enough. How many games do you give a player who's on-ice results indicate he is far from ready? Three, five, 15, 20? 20 games is a quarter of a season.
In my book Lindgren hadn't done enough to earn the callup in the first place, I would've picked Bigras or maybe Gilmour, so in my book two games are enough (one to worry me, one to confirm). If I agreed with the callup I could maybe stretch it to 3-5 games tops, depending on the outcome. But I would under no circumstance accept sub-30 CF% play for more than three games from any player, if that.