Hear me out
Use your academy/affiliated challengers team roster.
Mix and match the players and coaches however you prefer
Immediate upsides
1) Challengers teams have a really good chance to actually play in t1 even if its just 1 map
2) Mental fatigue of 7 maps is removed as breaks are available
3) More diversity in team comps based on what you want to run
4) More reasons for challenger teams to join and affiliate with t1 teams because it stabalizes t2
Downsides
To be honest idk the only thing i can see is probably just a lack of practice and unfamiliarity but that can be solved by simply doing scrims or playing even in bo3's and bo5's together
And to promote it. You get extra MONEY, for both teams reliably from riot for the job.
Riot probably never implements this but would be fun



