A suggestion to make Battlegrounds less painful
I think something that would make the game mode a little less aggressive and unfair to the accounts without a full deck of >25,000 PI champs would be to throw in some AI teams such as "Kang Team and Thanos Team" onto lower progression ranks in the VT.
Kind of like what they do with arena, these are champs that have no masteries applied and so the stat's will be a bit less, and maybe they could tune the AI to be less bs.
Especially if a summoner has one medal to go, instead of pairing an uncollected with a "deathmatch" Paragon or valiant, pair them with an AI generated Team with completely randomised champs from the pool, that isn't going to automatically ban all of their best champs.
I am thinking it would help get lower rated accounts out of the starting blocks at least, so they can become interested in the mode and not get steamrolled and discouraged.