I disagree with the bold part. Also, your jacket and trousers are on the tight side even if short is what you are going for.
Loafers traditionally were not accepted for business dress, but it has become accepted because it is so commonplace. I personally still wouldn't do it, but then again I wouldn't wear loafers ever.
I agree, they are tight, but still comfortable and retain the needed room I need. However, feedback is valued and I thank you for that. About loafers, I personally think they can even be worn without socks with a suit, although it will need a much more relaxed suit than what I have here. Overall I think loafers are a perfectly OK option during sunny days and summer in general. And one doesn't have to be in Milan to sport them with a suit.