Just look at my picture and you know that I can’t be writing from the standpoint of sartorial expertise. Nevertheless, I full well recognize that as it influences morale and retention and culture and gravitas, the dress code of a law department makes a difference. What the difference is, I have no idea and no benchmarks report performance differences between departments that are well dressed and those casually attired.
My advice remains simple: while onsite at a law department, everyone should remain dressed.