The byakugan and things related to it are still slowly getting more development, but right now the sharingan and things related to it are still better.
Also, you mention how Sasuke has been struggling against Otsutsuki opponents. However, it should be noted that it wasn't primarily the byakugan that those Otsutsuki opponents used to pressure Sasuke.
With Kaguya, the main issue that gave Sasuke and the others problems was the rinnesharingan with its dimensional shifting and portals.
With Momoshiki, it was mainly his rinnegan and his manipulation of the environment.
With Kinshiki, it was his raw speed/strength/durability and chakara weapons.
With Urashiki, it was his rinnegan abilities as well as his chakara stealing abilities.
With Isshiki, it was that unnamed dojutsu that allowed him to use Sukuna Hikona and Dai Kokuten.
Now, sure Kaguya's technique 80 gods vaccum attack is similar to the Hyuuga's vacuum palm, but that attack isn't a feat of the byakugan alone. You need juubi levels of chakara to actually be able to use that attack. It is a Kekkei Morra. In other words, no average Hyuuga could use that attack simply because they have the byakugan. The same goes for Kaguya's hair needles. You need very long hair for that and control over said hair.