Let's hope there's gravitas in the dressing room
When I was at uni I helped run the football team (the 2nds). In our first year we lost a cup final and were promoted in second place. We were the scruffiest team in the league, we didn't even all wear the same colour socks!
The second year by virtue of graduation the 2nds became the 1sts, we were in the top division playing top division teams. As a squad we raised funds for new kit, tracksuits and ties.
We arrived at matches looking the part, it was phycological but it affected us positively, and probably affected our opponents negatively, only small gains but gains none the less.
We won the league and cup two years on the spin.
There's something to be said for appearances. That said GON only has to arrive in his civvies once so shouldn't be a factor.
I've always liked a manager looking sharp on a match day, Graham Taylor was smart in his suit in a very uncool way, Lopetegui although well presented managed to look like he'd been playing golf when not in club tracksuit.
The wait for a sartorially elegant manager continues. Nuno and Zenga both looked the business in their suits on day 1, but quickly reverted to training gear.