Here’s an example with Anubis Ultra Talent.
Uniqueness: The biggest failing point of Anubis’ Ultra Talent is uniqueness. His role as a backliner is generic and can be found in other ubers such as Amaterasu, Gao, Dioramos, and even expand to other generally good generalists like Dasli and Phono. The more common this sort of archetype is, the less valuable Anubis’ UT will be for more players. Anubis may be better than some of these options especially in certain cases, but these alternatives require much less investment and allow you to use those resources to cover other niches instead of beating a dead horse.
Power: Anubis is among one of the most powerful backliners in the game which is his selling point for his UT. If invested early, he does break nearly every wave/ surge based stage in the game which notably includes Kappy Kawano, where a UT Anubis can lead into an early acquisition of Corn Cat. However, Anubis’ investment cost is extraordinarily high.
NP Requirement: Anubis has by far one of the absolute worst NP requirements in the game, requiring 1655 NP in order to fully max and still requiring 1195 NP even if you exclude his Barrier Breaker and Cost Down talents which are his least important talents. This extreme bar in NP drastically reduces his practicality.
While Anubis does become one of the single strongest backliners in the game, the lack of uniqueness in his role means you can find similar or possibly better options if you are lucky enough to own said ubers. The extreme NP bar also makes him unfathomably inaccessible and not practical for the majority of players. The most likely players to invest into Anubis are those who are unlucky and were not able to pull strong generalist backliners as well as players desperate for a good surge killer. Due to the many “ifs” for whether or not you should invest into Anubis, his priority is ranked clearly as questionable.
The last thing to mention in general is that Ultra Forms pretty much always have a very clear advantage over Ultra Talents due to the NP costs of UF’s being vastly lower than UT’s. The majority of UF’s also just simply benefit way more than the average UT.