Like others said if Marty sticks to just PBP he is still very good. But he comes off as a jerk,grumpy old man when starts giving his opinion on just abut anything. That's when I turn him off. He didn't used to be that way at all. I think all of those losing seasons along with losing Nuxhall as a side kick made him bitter for whatever reason.
As for players trying to lift a fly ball for a sac fly, I do think some try to do it. I can remember years ago Pete Rose saying he would try to upper cut his swing when he was in sac fly situation. But I do think more than anything it depends on the pitch and where its located if they are able to get enough lift and distance for a SF.