I don’t know if each different aspect has a different drop rate, but it definitely seems that way, because now for the fourth season in a row, Aspect of Star Shards hasn’t dropped for me below level 50, and I’m seeing many other Rogues complain about this each season too.
If it has been purposefully designed this way, it is insane, as it is literally the enabling aspect in the most common Rogue LEVELING build. What use is it when this aspect doesn’t drop until you’re almost fully levelled and looing to transition to an endgame build? Aspect of Star shards literally makes the difference between struggling to one shot in Expert, and Easily one shotting in Penitent.
Side note: I personally love DoK so much that I play it as far as I can take it into the endgame, but the process of levelling to 60 with this build is so hindered by the fact that it’s main aspect has such a terrible drop rate. Most Rogues don’t play DoK as an endgame build like I do either, so for them it is even more of as reason to just not bother levelling with what is clearly supposed to be the fastest and most fun Rogue levelling build.