First of all, I enjoyed Brush up Life, I found it pretty funny and it was interesting to see what the different jobs were like and what it took to get there. It was funny, hilarious and had many good moments, especially the dream sequences and times where she imagined about what she should do.
However, beyond this it was also very repetitive, and it's not just the many reused scenes that might as well be flashbacks, or that outside of taking a completely different route the lifes were nearly identical despite her future knowledge. She did change some things, and while it's even discussed that she could do a lot more, it felt kinda... useless in a way?
Ultimately it feels like the changes and growth she had at the end would have been completely possible within her first life, that combined with the frequent life-skips without the butterfly effect being all that visible was...
I guess it might just be the excessive familiarity of it all that bugs me, she did change a few things, but still, even the 'big' changes felt very achievable and it kinda annoyed me that we didn't feel enough variance inside her life outside of the jobs. A new hobby or aesthetic would have been cool, though I guess we do get one example for that last one and she did look slightly different with each job.
Plainly said, I feel like the premise had a lot more potential, but instead we got practically the same group of friends, sure there were some work friends and the like, but there's neither a new romance, nor any non-school friendships that last beyond a round. That especially combined with the reveals in the later episodes that kinda ignored the wide-spread implications that reveal would have, made me think of giving this a 7 instead of an 8. Because I feel like there instead being a single divergence point that would allow five different scenarios and we'd get to witness them all, might've done a better than the series we got. It's still good and watchable, but I kinda had higher hopes after the first life.