How does power compromise the writing? If anything it makes it better. All throughout the series Kishi has had Naruto preach about endurance and not giving up. Having the protagonists apply that theme to overcome the adversity of more powerful opponents is the perfect way to manifest the theme into actions. That actually fits way better than having the protagonist fight some scrub and then shout "Don't give up! That's my ninja way!". If the hero only fights scrubs then what did he actually endure? What theme does it support?
As for the plots , they are so much deeper and more meaningful in part 2 than in part 1. Part 1 was all light hearted and jovial ,while part 2 actually got into philosophy about peace that can actually make one reflect on the state of society in the real world.
Part 2 >>>>>> part 1
Power needs to be increased of course, but if it exponentially increases every time, the audience gets desensititized to what should b something great. I also enjoy strategy and taijutsu far more than Kindergarten boom boom explosions 24/7.
Look at Kaguya's fight. So much power but no style and completely underwhelming. Part 2, after Pain, destroyed characters, morals, disregarded adding depth, and lacked entertaining fights. If you possibly think Kaguya was more entertaining then say Lee vs Kimmimaro, then there is no point in me wasting my time debating. If you remove limits, the whole setting no longer fits, especially in something that's supposed to be a feudal era.
We enjoy style and substance over explosions. 9/10 you compromise those two for power. Just because you can find something so repetitive and unsophisticated interesting, doesn't mean we can.
If you go from death by Kunai to omnipotent in a series, it's so f*cking ridiculous. Yes, passing powers that seem that were presented as Godly or miracles does cross the limit. You're basically telling me we're supposed to be impressed the first time, then see even more ridiculous event happen in a few years. That's poor writing.