Okay so, before I start, forgive me if my English isn't perfect, it's not my native language. Also, I wanna mention that what I'm gonna say is mostly based on what I've experienced and what I think, not much on actual facts. I'm just here to give my opinion.
Now that this is said, the first thing I wanna say about Terastallize is that its complete ban seems to me like the worst option, as its use and/or power may be regulated. This mechanic is indeed very powerful, you can change the whole game just because of one click at some moment, but it definitely ain't stupidly overpowered as Dynamax was. Don't get me wrong, I haven't come here to talk again about the core mechanic from the previous gen, I'm just quickly comparing those two since Terastallize might be the second core mechanic to get banned. But talking from experience, it's been quite frustrating to go from one metagame to another only 'cause I wanted to have fun with the core mechanic of the gen (went from Over Used to ND AG, going through ND OU and Ubers).
Now, if I were to talk about the alternative options, I'd say that adding Tera type to the team preview would seem like the best option so far, as it would let us analysis what may be more dangerous that it'd seem to be. I also think it could actually make games more interesting somehow, since we would have to consider that the opponent could Terastallize, knowing what type it'd be, so we'd have to think more about the possibilities before making a decision.
Banning Terastallize for some Pokemon seems like the worst of these 4 alternative options, as it would probably just force us to play some Pokemon from lower tiers, 'til they're seen as too powerful with this mechanic. I think this option may end up with a complete ban.
Banning Tera Blast might be a good option, but first off, Pokemon using Terastallize as a defensive tool wouldn't be affected, and second off, not every offensive Pokemon actually needs Tera Blast (Sylveon would just Terastallize to hit super hard with Hyper Voice for example).
And the fourth option, which is to limit Terastallize to already existent types of the Pokemon, seems in my opinion like the second best option, as it would have a high offensive potential as well as a defensive use, even though the defensive part wouldn't be as strong as it currently is.
Anyways, I really hope this ain't gonna result in a complete ban once again, and I assume I ain't the only one to have been frustrated due to the ban of a core mechanic.
Now that this is said, the first thing I wanna say about Terastallize is that its complete ban seems to me like the worst option, as its use and/or power may be regulated. This mechanic is indeed very powerful, you can change the whole game just because of one click at some moment, but it definitely ain't stupidly overpowered as Dynamax was. Don't get me wrong, I haven't come here to talk again about the core mechanic from the previous gen, I'm just quickly comparing those two since Terastallize might be the second core mechanic to get banned. But talking from experience, it's been quite frustrating to go from one metagame to another only 'cause I wanted to have fun with the core mechanic of the gen (went from Over Used to ND AG, going through ND OU and Ubers).
Now, if I were to talk about the alternative options, I'd say that adding Tera type to the team preview would seem like the best option so far, as it would let us analysis what may be more dangerous that it'd seem to be. I also think it could actually make games more interesting somehow, since we would have to consider that the opponent could Terastallize, knowing what type it'd be, so we'd have to think more about the possibilities before making a decision.
Banning Terastallize for some Pokemon seems like the worst of these 4 alternative options, as it would probably just force us to play some Pokemon from lower tiers, 'til they're seen as too powerful with this mechanic. I think this option may end up with a complete ban.
Banning Tera Blast might be a good option, but first off, Pokemon using Terastallize as a defensive tool wouldn't be affected, and second off, not every offensive Pokemon actually needs Tera Blast (Sylveon would just Terastallize to hit super hard with Hyper Voice for example).
And the fourth option, which is to limit Terastallize to already existent types of the Pokemon, seems in my opinion like the second best option, as it would have a high offensive potential as well as a defensive use, even though the defensive part wouldn't be as strong as it currently is.
Anyways, I really hope this ain't gonna result in a complete ban once again, and I assume I ain't the only one to have been frustrated due to the ban of a core mechanic.