But no feature in game industry is ever complete. There are only features “in development” or not 
There’s no word about 2D games on the official Overview website. At least it’s not easy to spot it.
And Epic doesn’t say “we gonna develop 2D tools in our engine”. And they admit it few posts above.
It’s enough to compare release notes of Unreal and Unity. Where every release of Unity add some great tools for developing 2D games. And Unreal features are all about 3D games or 2D/3D games, but almost nothing exclusively for 2D.