I loveee the new hovercards and especially the featured achievements piece.
One suggestion to improve this would be to show the tier of the achievement when hovering. For example, right now I have 6,219 foods fed for the gourmand achievement, putting me at the 6k tier, but if you hover over the achievement on my profile you just see 'gourmand.' So the suggestion would be to say either Gourmand (6000) or Gourmand (6,219/7,000) (like how it shows on my own personal achievements page). IDK about others but im flexing having the high tier! same thing with Gelatin Defender and It's in the Cards (3.5k, 100, respectively), or really any achievements I have highlighted. this wouldnt be as much of an issue if clicking on the achievement took you to the target user's achievement page, but clicking it right now just takes you to your own page for that achievement. And I think it's easier to look at it at a glance!
IK this may get a bit weird with achievements w/o tiers; not sure if its easy to code that those wouldn't show tiering (or tbh idk if its that bad to still show "1" for the tier like it does on the achievements page. IMO I'd rather have the tiers and the weird "1" next to it for non-tier achievements than not showing tiers at all).
<3