Normal animal based sage mode would get beat by canon tenseigan, its only the custom ones on SL that might stand up to it. 7 inner gates open could match it tho imo, 8 would surpass.
What exactly would you be 'sacrificing' with the altar scenario though? Remove your own eyeballs, it spits out someone elses pair for you to implant?
As for removing 360 vision, dunno of that cause its kinda the core function of the eye. Removing jyuken would completely shut down the BS 'jyuken element' I mentioned earlier however, so that would be nice. Lion fists would go away with it since its a jyuken off-shoot I think. What about vacuum palm and kaiten though?
I know, which is why I made the comparison. Tenseigan of course is too much as it is for either Rinnegan or Sage Mode users to handle by themselves without some serious co-op action.
Perhaps, i'm not so much against the ideas of HOW its obtained as long as the user follows the dumbed down abilities and limitations. Maybe the eyes themselves can be transformed via the chakra from the altar itself?
I say the only things the Tenseigan should have in common with the Byakugan is the seeing of chakra. I think gaining the ability to cut mountains, Sage benefits (nix the Natural Energy), Gudodama, and Deva Path skills is more than a fair enough trade off for 360 degree vision, Jyuuken, X-ray, telescopic vision and Kaiten. Much like how the normal Rinnegan does not have the abilities of the Sharingan, except the ability to see chakra, despite the fact the Sharingan is the evolutionary offshoot of the Rinnegan.
To avoid the an inevitable Tenseigan/Byakugan hax, I say much like the Mangekyo, the abilities are sanctioned by which eye the user has.
For example:
Right Eye- Chakra Mode (a.k.a Sage buffs)
Left Eye- Deva Path (Shinra Tensei and Bansho Tenin)
Both Eyes: Gudodama (Allowing the full destructive potential of the user on a Perfect Susanoo level)
I'd rather not devoid the Tenseigan user of ever using Byakugan again as it seems unfair that we allow a Rinnegan/Sharingan combo to work just fine. That way, if one ever encounters them in a fight, they would either be a little less stronger than an actual Hyuuga Sage, or just a Byakugan user who simply has two abilities of the Rinnegan.
I don't think the Hyuga should have to give up 360 vision or Senjutsu usage just because they have the Tenseigan, Maybe they can't use it at the same time like I had said earlier, but I mean they could still do it
To give a Tenseigan user the ability to use Senjutsu greatly throws things off balance and they would have to give something up to offset the difference.