Eurdora Welty's longest story (to date) and why it doesn't work (for her)

Eudora Welty's June Recital, one of her longest stories, in the Golden Apples collection (her 3rd) in "Collected Stories" is quite a challenge for readers, or at least was for me, with its multiple layers of time and its fairly large cast of characters. Welty is an odd writer, in that sometimes she writes in very broad strokes and sometimes she uses indirection and subtlety and suggestion - and often, as in this case, in the same story. The first part of this long story involves a young boy, Loch, and his furtive observations of the goings-on in a seemingly abandoned house next door: a couple sneak in the back door and head up to the bedroom, an older women enters and starts filling the fireplace with old papers which she ignites. We wonder what role if any Loch will play - it's a Rear Window situation, he's confined to his room by illness. His sister is drawn into this a bit - and you can see that there are two stories: the comic zaniness - or is there murderous intent, or just coincidence? - in the old house and the more conventional literary Southern family in the foreground. Then the perspective shifts, we see things from the sister's POV, and we learn the background of the young couple, actually of the girl, a one-time piano prodigy now confined to playing in the movie theater (this must be in the 20s). It will not be a surprise (possible spoiler though) that the woman burning the papers is the girl's old piano teacher. Motive never clear, at least to me - Welty indulges in some broad comedy as two drunken fishing buddies stumbling home discover the house afire and put things right. All this still, very improbably, witnessed by Loch. There's a lot going on in this story and it has elements of Welty at her best, but overall seemed to me like a long journey to nowhere - too many loose ends and needless ambiguities, and really too much disparate material to tie together in one narrative unit. I appreciate that she's breaking a few boundaries here and trying something new, for her (and for fiction generally at that time) - the expansive format Welty was exploring has, in more recent year, been very accomodating for Alice Munro, but Welty seems a bit lost in the vast space of this narrative.