Yes, custom lineage is OP. Not disputing. I am saying it is the only racial choice I can think of that's actively OP.
To emphasise my own question. How do these races compare to variant human in your eyes? Are you saying that elves and dwarves were already better than variant humans and got better, elves and dwarves were worse than variant humans and are now better than variant humans, or that the balance between variant humans and these races is nebulous enough that it doesn't actually matter? And yes, Dragonborn had to wait until Fizban's.
I'm in the "Variant humans are good enough and the tweaking you are talking about is minor enough that it doesn't actually matter" - and variant human is still the best race and the most powerful variant human builds use the S-tier feats from the PHB. This isn't like e.g. Toll the Dead in Xanathar's where just about every non-warlock who could started taking it because it was simply better than the alternative despite that spell doing almost nothing to enhance themes.
Also I'm amused to see you talking about how dwarfs are so good when tieflings and dragonborn have been kicking dwarfs out of the top five for years and 2020 was the year they and half-orcs finally kicked out elves - and dragonborn finally (and deservedly) got buffed by Fizban's. Meanwhile no one cares about gnomes.