I agree. The challenge tower was 90% annoying nonsense. While I was playing it I was just wishing it was over so I can move on and play the actual game. I'm a completionist so I reluctantly did it anyway.
There were a few fun ones though. Ermac vs the 3 Goro's was enjoyable.
The ones that involved actually PLAYING MORTAL KOMBAT were fun, I agree.
There's definitely a way to make Challenge Tower enjoyable. I would suggest having a challenge where you have to complete a certain combo to finish it, a few where you have to anti-air someone a certain amount of times, tech 3 throws....things of that nature. Do it for all characters and have every challenge be something that is PART OF ACTUAL GAMEPLAY. Sort of like Dojo mode in KI (which is incredible, but only for Jago) but do it for every character in the game.
- Combo challenges
- Anti-air challenges
- Throw tech challenges
- Learning how armored moves work
- Air to air attacks
You get the idea. Like you said, I'm also a completionist, so I too feel the need to go through this shit. When I'm sitting there trying to throw my fucking head at someone to do damage it's not fun, it's just frustrating.