Link's tether recovery (or recovery in general) more or less sucks in Brawl, especially compared to Melee.
The Clawshot has been pretty nerfed in length, for starters, and you do not have the freedom of being able to "tether" onto the side of walls because it's bound by the auto-sweetspot.
There has rarely been a situation where tethering has been a better choice than Up-Bing for me, since I've started playing the game.
Also, it wouldn't be wise to airdodge-clawshot in a fashion similar to the way you'd do it in Melee (like, towards the bottom of the stage), because you'll just fall to your death. You do not have the freedom of direction when you airdodge in Brawl - it's all based on your momentum.
-Nox`