I don't think he was saying it was a problem to park/walk. I think he was referring to the way the ballpark feels isolated from the rest of downtown due to the presence of I-71, which I whole-heartedly agree with him on. If you come to the Ballpark and your mission is to park as close to the ballpark as possible, you never venture into downtown (maybe a positive for some).
For the area he's referring to behind RF, walk to the retaining wall behind the sundeck and look straight down. When that area was first reopened after construction, it was pretty well maintained. Now, not so much.