Pocket square without tie I find utterly bizarre and "wrong way round". Surely the pocket square is farther UP the formality scale than the tie? I accept that this may be a UK/USA cultural difference; pocket squares are, on the whole, rarer in the UK than across the Atlantic, and many (myself included) only wear one (and then only a plain white one) for occasions like weddings and funerals. I also think that the prejudice against the tie (even now) is less here than in the USA, and may indeed be receding.The tie and pocket square seems to be just a part of the rest of one's attire. I do see some men that will wear a pocket square and NO tie at all.
With this I emphatically agree.There may be a time and place for picture perfect "form" when it comes to being dressed properly...and then the rest of the time when you can be dressed decently and the way you want to look, "rules be damned".