Which Pokémon Abilities Should get the "Sturdy" Treatment?

Abilities in Pokémon are a range from amazing to terrible, but there are also a bunch of them that are just kind of there and aren't all that special. However we've seen small tweaks to these bland abilities before, like with Sturdy, so what other abilities could we take to their natural conclusion to make them a bit better? Because in doing so we could elevate a bunch of otherwise unremarkable Pokémon, creating a huge payoff for doing such little work!