Finally got a chance to sit down and play, I guess quick thoughts on the tracks
GCN Yoshi Circuit: Well it sure is Yoshi Circuit from Double Dash, probably the "worst" dlc track simply because this is now the 3rd time we've done GCN Yoshi Circuit and it feels kind of like a throw away. Not saying it's a bad course to race on, I just wish they had gone with another DD course that hasn't been remade or done more to take advantage of MK8's new features.
Excitebike Arena: This is a really fun course, might even be my favorite in this DLC 1 pack. I love how it's a faithful recreation of the original Excitebike with every single object from that game brought to life. It feels unlike any other Mario Kart track as it should and really sticks out from the crowd.
Dragon Driftway: Good but not great track, love the music and the design, but it just doesn't click with me. I still prefer it to Yoshi's Circuit but for one of the two new traditional Mario Kart tracks it's disappointing. I feel like with the theme of racing on a dragons back you could have done more.
Mute City: This is a blast to play, love the coin strip and the high sense of speed this track gives off. Only thing it's missing is a tube/half pipe section but that's a really minor nit pick. Nintendo PLZ make a new F-Zero!
Wii Wario's Gold Mine: I miss the half pipes from MK Wii, feels like the course is missing something when I play on it. Also not a big fan of the change to the jump in the cave part feels like you made a mistake for a moment until the world realigns and you keep going. Again not a bad retro track but I feel there were better retro ones they could have picked.
SNES Rainbow Road: Just seeing this compared to the SNES version makes my mouth drop, love how they updated this keeping the challenge of the original while adding in new MK8 features that belong and don't feel forced.
Ice Ice Outpost: For an ice themed level it's weird the only ice parts are in the optional short cut. Other then that it's a fantastic track and may even be my favorite of the whole DLC. Love the twisting track that you can often jump between, love the technical shortcut, and just have a lot of fun racing on it.
Hyrule Circuit: While it's not the most exciting track lay out the added Zelda touches really make it work for me, the rupees, sound effects, puzzle short cut, deku babas, and music really make me feel like I'm racing in the mushroom kingdom.
Really great DLC pack, looking forward to pack 2 next year