I thought "selects" would be their best selling titles like Breath of the Wild, Mario Kart, Smash Bros, etc.... If that is the case, then I don't think they will become "selects" for several more years since people still buy these games at full price when they get a Switch. A $30 (or less) Breath of the Wild really only makes sense when the Switch is $150 or less. At that point you are getting customers who are a lot more price conscious.
I guess a game like Mario Tennis Aces is pretty ready for a price cut, but I don't think it should get a special label. "Selects" really ought to be for their best selling titles.