Nah, she is 100% balanced. Ignore the idiots making meme posts about her on Reddit because they have no clue on how game balance works.
Jetpack makes her a big target if used incorrectly or in open space
Missiles dont even land most of the time (theyre best used to flush people out of cover) and cant be used indoors
Ult can be cancelled by enemy damage, and also make her super easy to hit as she goes straight up
Her passive scan is nice and all but it points out people you could already see with your eyes, JUST while skydiving. It does refrain from scanning Mirage decoys, though
Recon survey beacon scan. The whole class can do this, and lets be honest, your teammates always ignore these, even when you ping them. I dont deny its powerful to know where the next ring will land though and I always try to take advantage of these
Of course the geniuses of /r/apexlegends feel the need to compare a single ability (for example, passives) instead of the kit as a whole. If you want busted, just look at release Horizon, who had just a 5 second downtime between gravity lifts.