Ignoring the fact that the tie looks like it was knotted by my 7 year old and seems to be pretty cheap, that tie looks horrendous with that shirt. The pocket square makes no sense in the scheme of that outfit.
I like it except the tie as well. Looks like a bag of skittles exploded on him. I dig the pocket square. The great thing about O12 is there were lots of great looks, all individual and unique from one another.
The pocket square goes with the outfit quite well. The summer preppy (or is it trad? I'm hardly an expert) tie seems a bit weird to me in the context of that outfit but age always helps with eccentricity. Makes me sorry that the suit doesn't cut it, pun intended.