Did Alphys breach ethics in experimenting on the monsters who had "fallen down"? Argh...I still can't quite decide. To her and everyone else they were more or less dead, by that point...it is not the DT experiments themselves where Alphys really blew it, in my opinion, but the way she handled the failures. Desperate for a success to crow about she made promises that she couldn't keep, then hid from those she'd given false hope, hid even from King Asgore. And presumably she also never told Asgore about the escape of "the vessel", i.e. Flowey. As I can testify from experience...hating yourself makes it easier to lie.