league doesn't matter but game ratings and indeed your team is fortified very well. now the question is how he perform if he is the only best Shotblockers on your team, and see if he still can average the same. shotblock is individual skill and shan't dependant on other players SB rating.
i don't have much experience with training shotblocking, but watching how GE treat my lv13 shotblocker last season, is enough to remind me the same feeling of 4-5 seasons ago (less SB occurence, no shotblock help off weakside). my conference that time didn't have much dominant inside player and that still didn't offer advantage to my center.
Champions are those who kept fighting till the end. Even if we lost, we are still the Champion. "The Queen - We Are The Champions"