Isn't saying that you're going to buy them judging them prematurely, though? You've already decided you're going to buy them with barely any information available. It's just as hasty to say they're worth your time at this stage as it is to say they're not.
But honestly, I don't think judging the games prematurely is an issue here. It's a Pokemon game, and we all know on some level what we're getting, and what we can expect from that. In a franchise like this, where things really do not change in any ground-shaking way between instalments in gameplay terms, it's the little things that can make or break the purchase. The little things are what people look for in core Pokemon titles, and those little things can delay or outright put off purchases...or secure a day-one buy.
Like, for me, as a random example...if I see Lillie hand-holding through the region again, I won't buy these myself. I will probably ask for one for Christmas, but I wouldn't buy them. If I saw something crazy like revisiting Sinnoh after travelling through Alola, I'd buy these day one and I'd be bouncing off the walls between now and then, too. Gameplay is a non-issue because I already know exactly how it'll play. It's not really premature to judge the games based on that. Everyone has different priorities. The whole point of the thread was to find out what those are~