I concur, irrespective of my fondness for most of the Uchihas. Naruto became sorely unvaried due to the incessant focus on them.
LOTS of characters with potential, yet less than half received proper DEVELOPMENT. It is unnerving.
OT: My two cents. I understood it more as a correlation versus a comparison between the two. Meaning, both parallel and one cannot cancel out the other (i.e. are equal in terms of base power on the dojutsu scale). Which one is more powerful comparatively is actually subjective, as that would VARY and be determined strictly from user to user.
The Rinnegan has its foundations heavily rooted in the manga, hence we have seen more of its potential tapped (i.e. MADARA, NAGATO, etcetera). The Tenseigan, conversely, only has its foundations in a two hour movie (which automatically puts it at a disadvantage comparatively) and only one user (i.e. TONERI) thus far.
Ergo, most comparisons drawn between the two are false analogies in retrospect because we simply do not have enough pertinent information on the overall abilities and capabilities of the Tenseigan.
I simply see such comparisons as dubious at best, given the little information provided to us on the Tenseigan, and the little exposure it was given on the battlefield compared to the Rinnegan.
