Regarding the Baam power level in comparison to Jahad/FH, is it really a discussion worth having at this point in time? If the point behind saying Baam is weaker in this stage of the game compared to how they were back then, is to say his growth is not that impressive, I think people who advocate for that are not even looking at the big picture.
Baam is a couple of years old, granted we don't know how long he spent on that cave, but his body has matured at an expected pace since the story began, so it's kinda pulling stuff out of the ass to expect him to have spent centuries trapped in the cave, looking like a child, and suddenly being a teenager. We know for a fact that Jahad/FH are at least a thousand years old, by facts dating back to their climb, so unless we expect the story to be told in the spawn of a thousand years, when so many things have happened in just a few years, he's going to be stronger/Jahad level in a couple more years. That already means his growth/talent/level is unparalelled, when it comes to non-axis characters. Urek's the only character that's hard to compare to anyone really, but it seems a bit of a stretch to say he is on a completely different level from Jahad.
Baam was never strong to begin with, he's been built as a character who acts like a vessel for any newfound power, with limitless potential, so his growth rate just depends on how fast SIU wants to dump a credible amount of powerups on him, and give his own body/shinsoo control some other powerup to mature and mix it all up. He can't make a time skip that envolves a lot of years, because all character interactions would just be lost/had to start from scratch, so seems like Baam will end up being the biggest monster of them all in the least amount of time.