Well, Mario Maker is definitely the title to beat on the Wii U. And the majority of Wii U games are now much cheaper than they used to be. You can get a copy of Zombi U at most used game retailers for less than $10. If you're interested in giving the Wii U a try, then yes, it would be worth picking that particular package up. Especially if you want a new unit. If not, you might be better off picking up a used unit. Used units on Nintendo hardware are usually a fairly safe bet. Nintendo always designed their systems to be durable, so a used Wii U is more likely to work than most other used consoles.
As to whether the Wii U itself is worth having, that's more a matter of personal perspective. In my case, I would say yes. But I am a fan of Nintendo's internal development, and have been for most of my life. It would be a good idea to peruse some "Best of Wii U" lists, and see what kind of games are on such lists. If none of those games seem interesting to you, then maybe it would be better to pass on the Wii U. A system with no games that you want to play may as well be a paperweight.
Also, the number of Wii-related accessories that you own is also worth taking into account. One of the Wii U's biggest strengths was in its local multiplayer support. But local multiplayer requires extra controllers. If you don't have any extra Wiimotes sitting around, and there aren't many single-player Wii U games you want to try, then once again it might be better to give the Wii U a pass.