I'm going to speculate that he lost points on speed on block design, hence the "should". If this was the WISC-V, there should have been a motor-free spatial reasoning task, too (visual puzzles), which, presumably, would be better.
I don't know that you can really say his vision is functioning well enough. Something (vision, or fine motor, or something else) is not functioning well enough, or he would have scored a lot better than a 1 in coding. If it were "just" average scores, that would be one thing, but, unless there is reason to believe the coding score is not accurate, this is far below average.
Sometimes skills catch up with maturity, but sometimes they do need remediation to do so. Not clear from the available information which of these situations this is, but the severity of the deficit/delay is concerning.
