Ports are not good, though I understand Nintendo wants to get more money for the investment on some great games that might not have been bought because the Wii U did so poorly.
However, enhanced ports with 2 more cups in Mario Kart...or 2 new characters in Smash Bros. Or Splatoon with new weapons, levels, modes of play, that would be fine. The important thing is to make it valuable for the loyal customer.