Those numbers look extremely similar to the straight popularity polls people have done on Covenants, polling most casual players, so the idea that this is because of Covenant power is super-questionable.
In fact, if power was the main concern, Necrolords should be doing better than they are.
You have no right to be annoyed and predicted nothing that wasn't self-evident.
Blizzard have always known that they will have to rebalance spells and abilities, and always have, in every patch of every expansion for sixteen years. Given Covenant abilities are spells and abilities, your "prediction" is like predicting the sun will rise tomorrow. And it's ridiculous to be "annoyed", because it was inevitable. You can never perfectly balance this kind of stuff in beta. It always has to be on live. They actually did a surprisingly good job or avoiding wild outliers, but there will be stuff they need to reign in.
Can you define what "80% lopsided" would actually mean, because that's an awfully vague claim? 80% of every spec in a specific Covenant for that spec? I.e. 80% of VDH are Kyrian? Also which players do we consider? All? Only Mythic raiders?
We already see stuff unbalanced but towards aesthetic in some cases - pretty much no-one thinks Night Fae is the best Covenant for Guardian Druid mechanically, but it's the largest for them at 48%.