https://twitter.com/valesports_emea/status/1603090356287021059
https://valorantesports.com/news/challengers-emea-2023-vision-and-format/en-gb
It doesn't. Just look at Challengers APAC. Indonesia, South Asia, Malaysia/Singapore, the Philippines, Vietnam, Oceania, Thailand, Hong Kong/Taiwan, all have been using the three home region players rule since 2021 and they've been quite consistent and successful in managing it. It won't be the end of the world.
Just compare the amount of international teams vs the regional teams that made it into t1 events in EMEA the last 2 years. Sweden, Cis and Turkey are the only regions that really managed to do that consistently (2 of which had separate qualifiers).
VRL is the only way to get into tier 1 now, so its supposed to generate the highest quality teams and placing such a hard restriction (that then doesn't apply to t1 anymore) is just gonna end up creating a team skill gap in the long term imo.
It also doesnt help with EMEAs communication problem (talent not being able to shine due to not being comfortable comm'ing in English and as such not getting picked up by better teams).