No, not everything he does is great. But doesn't it strike you as a bit odd on a team that largely improved across the board offensively and was one of the better offenses in the league, Austin was largely a non-factor and the Rams were ready to send him packing by season's end?
His ceiling is nothing more than a specialty player, maybe a better Lucky Whitehead. He'll probably catch a few bombs, maybe a few big runs off bubble screens or jet sweeps and that's it. And frankly, that's all I need from him or expect from him.
But people expecting him to become this really, really good WR (that might be able to challenge Beasley, for example) are probably getting way ahead of themselves. It's also a bit unfair to the WR coach to expect that he's going to turn this guy into some playmaker.