This would be way complex, unless L80 promoters have like a +1 level oppos or more punishment like we have now when we promote.... so L80 + a "spared" 81 one teams reach it or with teams surpassing it....
so it would be like...
Max L is 80 for all in terms of accessibility, then all L80 teams have different Level, like 80, some 85, some even 100... but all of them are int eh 80 which is the max, but, if a 100%+ team promote play the L81 that needs to be a hgidden level for L80 (or +) promoted from L80+ with +100%.....
way complex...
Actually I guess that in top server the tanking effect affect the entire team list when repeating level... as teams are stuck so even the top teams at some point are in a tanking effect....