I did a little searching through the WR forum and didn't see much cometary or opinions on these SAs. Are they worth picking up as AE? Description wise, they sound pretty good.
no, because they are all situational. SAs like RR or CD are far better as they work on every down. (well RR only works on passing plays, but still... better than JC, DC, and 1HC)
Depends on what your player is used for. If you are a guy who needs a high catching percentage for your team to win then they help great, they give you the extra little boost on uncertain passes. Are they going to help you every game? No, but they are good for a few extra catches.