This is kind of useless advice. Where exactly is a NOBO who gets to KM June 15th supposed to skip to? That's too early to start a SOBO, and most of the rest of the trail will still be snow-covered. You might be able to get into parts of northern California, but not all of it.

Best bet for a hiker this year who wants a continuous thru-hike is to SOBO. Otherwise, I'd say start late at Campo, deal with the heat, and hope the melt goes quickly.