CP is nothing but a number that increases exponentially and does not represent the power of a character, only an estimation of what the character is.
For example a +11 stage 5 SoA user will be in the range of ~5~13m CP depending on class, ERP, armor, accessories and costumes
While to a lesser extent i think it is useful (not good) to have CP be a requirement to access dungeons, what other solution can there be?
Right now most of the later content with "random parties" is arranged through party finder. That being said, if you are a 2.5m CP Immortal, assuming the CP requirement for dungeons was removed.
It's safe to say nobody will expect that person to be able to deal any damage starting Ran raid.
It is likely the person who starts the party finder will look for another DPS who is better equipped.
I can understand that people would argue and say "what about the supports", but it would just be unfair for the DPS characters that they cannot access content as fast a support characters.
In a vacuum nobody should be punished for the character they pick in a video game, but at least it puts DPS and Supports on common ground in terms of progression. (DPS still being a heavier investment than Support)
I do think Tenebrous should be standardized reward from phoru quest, and +10 VoS.
If the goal is to keep newer players to catch up with endgame, even +11 FoJ is way too outdated/redundant, even if being given a VoS, players are still subjected to farm Berthe raid, which is still a large task unless they have friends willing to help out.
As for armor, Tenebrous Should be the new standard, Rigomor armor is how many years old, and Elsword's design does not even offer proper guidance on how to form a functional party.
With that in mind its in my opinion that this should be dispensed from for guide. for the extra boost in damage.
The phoru reward could be +10 vos, +9 tenebrous r12
punch event could be +11 vos +10 tenebrous r15
battlepass offering tenebrous r18 ticket