kindly vote for the options you think are needed, some ideas might not be feasible but i will share them with you. add your also add your thoughts or correct the options how you'd prefer in the comments.
Your vote: in 1v1 or 2v2 smaller notice of the 'opponent left the match' or 'rejoined' and at the bottom of the page(so you don't lose concentration)
Redditpoll.com