I can see where you are coming from but I disagree. I don't trust Capcom NOT making a Monster Hunter World Ultimate. They tricked me with Monster Hunter Tri when the Ultimate version came two years later. I will wait for Monster Hunter World Ultimate to come out on PC before it comes out (Probably 2020 release). This is why I am getting Generation Ultimate first. At least the game will feel complete.
Also going backwards just requires a bit more discipline for me. I played through and beat Dragon Quest 1 a few months ago. Now that was hard to do! I still had fun with it though.