I'd rather have the canyonlands and the entirety of the lake, though i suppose having the whole mesa would be a good idea - but maybe keep the southern border restricted to the top edge of the mesa such that someone can have the valley to its south if they want. idk if that's something people value but that's what i wanted in perilune's west
personally i don't really like that shape (i know that's kind of dumb, but i don't)