My opinion on cross server SWB
I'm a F2P, LVL 79, 37k BP on S1

-I don't remember how many people were active in the fight, but it got divided in 33 for each field
-I fought against people from servers 7, 9 and 11
-Altough in my first couple of fights I got a lot of people with way less lvl and bp, on the last 15 min or so had more people alive compared to the usual SWB, and closer to my bp too
-Got 4th place in my team, rank 23 on server 1

my thoughts: for sure it got more competitive, some tweaks could be made to not get a huge power gap between the players with low bp