Can people stop randomly ninjaswitching to a 3rd Strategist mid competitive game cause enemies aren't dying?

At the very least, COMMUNICATE YOUR ROLE SWAP. If you're on duelist and then make an executive decision to swap to strategist cause you think you aren't getting heals therefore neither is your team then at least say something to your team about your swap so others can adjust and fill the gap you left.

You're making it even harder on your team especially if your team comp was 2/2/2 and you decided to make it 2/1/3. Not sure how common this is below Gold but holy hell it happens A LOT in Diamond. Why is it always the ones who insta lock duelist too?