Looks like some of the heat tiles on the bottom test patch fell off at some point. Excellent feedback for higher altitude tests though.
I'm kind of hoping they try something a bit more "vigorous" with SN15 after they get a chance to examine it thoroughly; Instead of a slow climb to 10k meters, a rapid climb to 100k or as high as they can reasonably get it with only 3 raptors and the max partial fuel complement those 3 engines can lift. Obviously they're not going to be able to SSTO it so I'm still just talking up and down with no horizontal component. But maybe get some data on a little bit of reentry energy, compare temps on bare skin vs shielded sections.