I play a lot of zone. I don't tend to play it at D3, but it becomes more useful at D1.
Let me do this by comparison:
Grinstead's poor ATH & DEF will mean that he will commit more fouls than you'd like even when his IQ becomes very high, but he is not useless. While you fill other positions, he could be your backup C in a 2-3 or backup PF & C in a 3-2. A problem remains that rebounding is a function of the ratings REB*ATH*IQ and position played (and, potentially, with an effect bump relative to the opposing opponent at the same position). It's possible that blocked shots are computed separately within the FG made/missed decision tree, but I think I've heard some say that it isn't. In either case, I am convinced that ATH is a limiting factor on effectiveness in REB or SB. However, I don't regard him as useless...
Snyder's just better (and improving in the right places).
By contrast,
Larsen &
Wagner, were they racehorses, might be best euthanized on the way to the track! Those are mixes of ratings that scream "do not even look at the court!"