From the "core" professional teams of previous years (circa perhaps 2012 and slightly before the implementation of Challengers/Champs), here how it has played out for reference:
Infamous: played in numerous relegation matches, now relegated for 2 events and counting
Dynasty: never relegated until just now, WCO was perhaps their worst performance at a PSP tournament in memory
X Factor: relegated, back into Champions for WC
Damage: played one relegation match, never been down to Challengers
Houston Heat: has been bumped down to Challengers via relegation once, now remaining in Champions
Vicious: Relegated a couple of times, now managing to stay in Champions more consistently the past few?
Russian Legion: total team reformat, bumped down to challengers, now more consistently seeing time in Champions
Edmonton Impact: never relegated, consistent Champions performances over the past while
Chicago Aftershock: has frequently bounced between Challengers and Champions
CEP: stuck in Challengers as long as I can remember
Extra - XSV: stuck in Challengers as well after coming over from mainly NPPL
POINT BEING, the Challengers division has touched MOST of the "core" professional teams of the recent past, with really only Impact and Damage managing to never get relegated. Minus XSV, that is 8 of 10 at some point being bumped down.
I'm all for this format because it keeps it demanding and entertaining, and if we want to grow the sport to be more spectator friendly, having this drama should continue to be a key tenant. If the Euro Football relegation style was a part of OTHER professional sports, just imagine what it would be like