What specifically do they not like?
There are large sections inside the stadium that have no good line of site or are blocked completely by the broadcast booths. some places you have to put on hiking boots to get to the bathroom or food areas.
And an issue that does not bother me but what I hear the most on talk show radio is how the weather around Stl does not warrant having a dome at all.
Personally I am fine with the stadium. I am just relaying what I hear from the vocal majority around these parts.