It's good, I guess? The qualities of a great game are there but are brought down by things like ice pikmin that make sure the game is a boring cakewalk. Then, the dungeons aren't randomly generated this time around, yet most of them aren't memorable at all, making you wonder what the point was of all that effort.
Lastly, my biggest complaint is that the bosses are sadly the worst new additions to the franchise. Most aren't memorable or hard at all. This is especially dissapointing to me since the bosses are my favorite parts of pikmin.
On a more positive note, the graphics are stunning, Oatchi is awesome and if you do like what's there than there is a lot for you to do.