This part of match making makes a lot of sense, but somehow oasis managed to fail.
for players under lvl90 - it worked kind of OK. but for lvl90 players not so much.
players lvl90 can have 40k-100k (even more) BP, and somehow they were put into same SWB event.

my idea:

lets say we have 180 players with lvl 90 (BP varies from 40k to 100k).
1. we arrange them by BP from strongest.
2. split them into let's say 3 groups
3. rank 1-60 goes to SWB no 1. rank 61-120 goes to SWB no 2. rank 121-180 goes to SWB no 3.
4. we use "snake" method in each SWB to make every lank competitive.

Problem solved.

But somehow i can feel that they will leave it as it is...

In my server alone, there are 64 ppl with that has lvl 90. i believe around 20 of them participated in SWB. so it's not that there are not enough ppl with lvl 90 to make correct match making...