not for shadow tag or arena trap but for trap based moves like spirit shackle.Please no. Go learn about the competitive scene before suggesting such things. Some Pokémon's trap is already devastating.
Rest everyone will use the Op things you're suggesting.
how would you stop them from doing that everyone does? and to de-centralise the meta in your own way?All your suggestions are called "Centralising the meta". Please check the term out.
If people overuse sweapers then we need concrete stalers, abilities to stop/slow them down reduce their stats or damage them somehow or if they oversuse stallers and wals then we need options to break them or KO moves or Z-moves to break them.