In the long run.
The most important thing for riot is Zeta and DFM to maintain the Japanese viewership. Tier 1 players come from Tier 2 and a failing tier 2 system will produce suboptimal domestic talents.
Japanese doesn't want to watch a full Korean team. But they don't want to watch a losing team either. That means Riot will have to fix the system. Either way import slots will be reduced to 1 unless Korean spies disguised as Japanese orgs complained just like how LCS orgs wanted to remove the import slots