Please do elaborate
What do you mean by passing up exactly? And who? Which experienced teams? Which junior team?
As I mentioned, I didn't want to bring up specific skaters. My reflexion is more along the lines that sometimes, a team moves up from junior to seniors and is buried down for years in national/international rankings while other teams, some they may have beaten when they were competing together as juniors, seem and I say seem, to be fast tracked to the top of the pack nationally and are better positioned internationally.
Is it because the latter team made a better transition or is it for other reasons like internal ranking and opportunities (or worse, politicking) ?
In ice dance, it's rarer to see juniors who already skate like seniors, with all the strength, skillset and experience that skaters who are in their late twenties or early thirties had an extra decade to develop. Yet, sometimes, a team seem to be parachuted to the front, leap frogging others. In singles, yes, a very talented skater with a big trick like Ami's triple axel, can lead her on the Olympic podium right away. In ice dance, there is no such thing as a very specific element that can make a difference up. Most likely, more junior teams will lose levels compared to the seasoned competitors and have a lower base value.
Yet, sometimes (and perhaps rarely I should say), a team seems to be "accepted" right away in the top tier of seniors, right upon arrival on the senior scene. Am I the only one noticing that ?

It's quite possible I am overthinking things.
In other words, I am curious to see how Layla and Alexander, who finished 4th at Junior worlds, would fare compared to the other three teams who beat them in junior worlds. Two of these teams have a lot of internal competition. The other, has a perhaps clearer though never an easy path. Would Layla and Alexander benefit from the reshuffling of ice dance in Canada ? They already have a GP spot. The Ukrainians have two spots but the USA and French do not (I think they are younger and may still be skating JGP). Or will they skate a few years in senior, be buried down the rankings and then, when younger junior teams they competed with finally reach the GP circuit, be buried down even further or not ?
Ice dance junior to senior transitions are tricky this way for me because it takes not only work and talent but also years of development to reach better technique. So, sometimes, and I guess that sums up what I am trying to say, I have a hard time understanding hierarchical rankings among the younger teams in ice dance, especially once they reach senior competitions.