Isn't calling it "best handheld Mario platformer" make it better than all the Mario games ported to handhelds in the past? Better than Super Mario World?
I personally thought it was a nice appetizer, like the minigame sections of Mario Sunshine where you landed into these strange dream-world like levels with floating blocks. It was a rushed game by Nintendo's own admission
(all the way to having Brownie Borwn help develop the game after the 2011 earthquake to have it out by the Holidays to save the tanking OG 3DS), and it had great music as a Mario game should, but it was something simple that they could make a ton of levels for to make a decent release as opposed to something that truly lives up to what past Mario games have done.
An expansion pack doesn't have to be short to disqualify it from seeming like one. The staggering amount of content SMG2 had is exemplary, double the stars of the original game (and every previous 3D Mario game up to that point in time); but it is certainly less ambitious than the first game (reduce everything to simplistic linear SMB3-like levels), it drops many things that the first game made it a point to do (like actual world-building), and it wasn't as eager to impress (the original game had a ton of eye-popping, epic, and visually impressive moments, while the second one was almost bland in it's presentation, it
knew it was a level pack, which is obvious since the game
started out by including cut and rejected content, also by Nintendo's own admission).
I enjoyed SMG2, got all 120 stars and almost all of the other 120 green stars. I have no problem including it as part as why the Galaxy series is awesome, but to say the 2nd one was even as good a game as the first one just seems silly to me.
Both 3D Land and Galaxy 2 were made not only to primarily to feed an empty release schedule, and that's not a bad thing; but they were also made to appeal to those casuals that only want simple 2D Mario
(also by Nintendo's own admission) at the expense of what one could look forward to in a full blown 3D Mario game, and that sucks.