Gnome: Consolidate, though I'm not sure if they'll lean Rock Gnome (because steampunk) or Forest Gnome (because fey).
I just don't see how the current version of Rock Gnome survives under the new paradigm of only physiological or magical traits for races. Constitution bonus? Gone! Artificer's Lore? History knowledge is aquired, not intrinsic. Tinker? Got to learn how to make a clockwork toy, music box and a lighter.
Fadeaway should be folded into the Forest Gnome suite of abilities and Deep Gnome should be added to the PHB (they've been reprinted four times in the life of 5e!). Tinkerer should be a background that is common to, but not exclusive to, gnomes.