i have a lot of respect for your positions & demeanour, & don’t want to talk much about most of your post - i just want to outline why i would be against a ban of terablast.
i explained my stance
here for the most part, but i’ll give some additional thoughts.
there are two reasons why i am against banning terablast, one is on a practical basis, the other more primary one is a more foundational tiering concern.
1) it is such a sparsely used move in the first place, has a lot of opportunity cost associated with it, & the problematic users of it (practically just gambit as it stands) are also problematic by virtue of other benefits afforded by tera itself even without running terablast, such as flipping matchups & turning stabs into nukes. banning terablast does nothing to fix the tier in reality.
2) terablast in & of itself does not fit the criteria of banworthtness, thus, if we are to follow smogon’s consistent tiering philosophy, it cannot be the focus of action in the metagame. it seems to me that the push to banning terablast is actually a push to normalise broken pokémon (once again, gambit), which is not how good tiering works. it leaves us in a state of tiering action being arbitrary & lacking a solid foundation.
if a limited pool of pokémon that occasionally use terablast in a problematic manner, whilst all others do not, it is the pokémon & the confluence of their unique traits that is the problem, not terablast.
furthermore, any argument alleging that terablast introduces uncompetitive aspects to the metagame can be made for tera as a whole, but with far greater validity.
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i recently had an extended conversation with a council member, in which they expressed that they are in favour of a terablast & stored power ban to potentially normalise volcarona & magearna, and dropping them to ou. the logical conclusion of this mentality leads us to situations where banning speed boost to free blaziken in g5/6/7 is acceptable. this rational is one i see increasingly common within the community. i’ve already outlined the issue with such a mindset in this post & previous posts.
i find it concerning that the community is adopting such a philosophy.