I think the biggest problem is that SA tier 2 can't scrim the tier 1 teams, which kind of prevents the region from developing properly. It's not that apparent yet, but after a few years of all the good SA teams being based in LA, it'll probably become more pronounced. IIRC Leo said Riot considered a rotating league which moves every year but decided against it for logistical reasons. Personally I think for the development of the scene that could have been a very good solution. EMEA teams (excluding sub-Saharan Africa, but there's nothing there in terms of Valorant anyway) can all scrim the partnered teams with a reasonable ping.