So, I didn't really like that feature before, I think I only activated it once and the unholy mess I discovered when I sailed west made me lose interest in that game pretty quickly. But the changes look good though, so I'm considering giving it another chance, only that this time I don't want to quit the game after a couple of hours of gameplay, the moment I see the first blobby island crowded with disoriented natives and with a big ass desert in the middle.
Just play Portugal and do the odd exploration west. If you like what you see, fine. If you don't, just continue around Africa and get a lock on Indian trade. If you find nothing at all out west, within range, that's perhaps the best outcome of all because all the other colonizers (with their inferior range) will be stuck worse than you and you'll still have your lock on India.
Portugal's also easier because you don't need to use up your small army and manpower to garrison colonies, MP to attack natives, etc. Makes the whole Ivory Coast thing a doddle.
But watch out for Morocco+Tunis, in 1.14 they're opportunistic, aggressive, and might be after you more than the reverse. If they catch the Castile fleet in the Med when they DoW they can probably beat up you and Castile simultaneously in the early game, especially if Granada is still around, so make sure your navy is tooled up.