The FO appeared comically overpowered in TLJ, beginning to colonize the entire galaxy and dominating everything despite appearing on the scene only recently and having their doomsday device destroyed. After TFA, I expected TLJ to open with a power vacuum in the galaxy.
It would seem that having a weaker FO in TLJ would compliment how TROS opens. However, the Resistance still needs to be cast as the last sliver of hope in that movie. I’m not sure much can be done, perhaps just reworking TLJ’s crawl to sound less bleak and remove Rey’s offscreen line about the FO controlling all the major systems within weeks.