Elf lover wrote:1. It makes extended and undead branches very tedious
This argument could be strong, but it's hard to discuss it when you don't elaborate on why at all.
2. It forces player to pick TSO or makh if he wants to go extended because other gods provide no means to sustain torment damage in fight
Kiku, who seems to always be severely overlooked by the majority of the playerbase, prvoides tournament protection too, but even if you include Kiku and Zin this isn't true at all. Those four are probably the best four extended gods, but they're not the only viable ones, and they'd quite likely still be the best four extended gods if torment were removed.
4. It is very unfriendly to new players
Why should the optional stuff that, as far as I know, is intended to be the game's hardest content (not that it is the hardest content, just that it seems like it should be in theory) be "friendly to new players"? If you just mean it's spoilery, that's somewhat true, but then you could argue that pretty much any monster ability is. Ultimately I think it's pretty reasonable to say that a new player (especially one who's gotten good enough at the game to encounter torment) should be in the habit of using "xv" to examine any new monsters they see and examining any spells they're not familiar with, and if someone's doing that then that kind of removes the spoileriness of it (unless the description is poorly-written, in which case that's it's own problem).
5. It feels increasingly reduntant with all these smite-targeted spells like smite, hellfire, draconian's upheaval, etc
6. It encourages luring because it is only right option to deal with tormentors
I would say encouraging luring is more a train of a trait of dangerous smite-targeted spells than torment in particular. This could be an argument for reducing the number of smite-targeted spells in extended, rather than removing torment altogether.
Overall, I think torment definitely has major issues, but I don't think you've made a strong case for removing it here. Partly, I feel like some of your arguments could use some elaboration (like the tedium one), and partly, I think you're making different arguments that address different qualities of torment, which means you might be making more of a case to alter torment than to remove it. For example, if torment were no longer smite-targeted, that would partially eliminate at least half of your points.