You make good points, tho I can *almost* give them a pass on DQX, as much as it pains me to say it, due to the poor sales of the Wii U & the cost of running servers they'd have to take on. And yeah, I know it came out for the Wii as well but that's deader than the Wii U these days.
But DQ7 I can't wrap my head around. AFAIK, the DS DQ ports sold well. Bravely Default was a big success for them from what I understand and, hello, old-school RPG. I just can't figure what their reasoning would be on that.