Although I'm a "hardcore" gamer, I did enjoy the original Wii Sports quite a lot when I first played it as well as as on subsequent revisits. Wii Sports Club is basically a Wii U remake of the game, with its main additions being online play and the incorporation of the more-accurate Wii Motion Plus controllers (and for the Golf game and the catching portion of the Baseball game, the gamepad). There's also the addition of locale-specific "clubs" you can join (e.g. one for each state in the US, etc.) whose rank goes up and down based on online matches, but this seemed fairly pointless and I didn't spend much time with it.
As with Wii Sports I ended up spending most of my time playing the Tennis game, specifically the training modes. I definitely appreciated that the three training modes are different than the original game and include more variety. Here as in the other games I had to adjust to the more-sensitive Wii Motion Plus controllers. Supposedly the gameplay is more true to life with the new controllers, but after playing a fair amount I'm not sure that for someone who doesn't play the real sports like me that the differences are worth the hassle. The main issue isn't the increased sensitivity in the controls, but with Tennis anyway I ended up having to pause to recalibrate the controller pretty much in between every play of the training modes. If I were playing more casually and weren't going for a high score it wouldn't have been such a big deal, but without calibrating, the controller would easily get confused about simple things like if I was trying to do a forehand or a backhand shot, let alone the angle of it. Wii Sports Resort on Wii also had used Wii Motion Plus and I don't remember it requiring this near-constant recalibration, and this along with the so-laggy-it's-almost-unplayable online mode makes me think that Nintendo was much less involved than Namco Bandai, the game's co-developer, with this release.
Despite this problem, the Tennis modes are still fun overall. It's still oddly relaxing and hypnotic to play against the computer and return volley after volley, and the "thwack" sound that comes from the controller's speaker on each successful return is still extremely satisfying. I tried out all the other sports, and although Bowling and Baseball continue to not interest me at all. Golf looks like the game that would most benefit from the new controller. Boxing is much more deliberate here, unlike the "flail-fest" that the game was in the original Wii Sports.
Next time I pick this up I'll probably check out Boxing more closely, but overall the whole package definitely feels non-essential and definitely not Nintendo's best revisit of a classic. Nintendo tried out something new in the pricing of this game, where they released each sport as a separate download for $10 and provided the option to buy a 24-hour pass for a single sport for $2. The latter seems supremely pointless, and I'm glad I held out for the retail release of the combined collection on a single disc.