2.8 is a massive refactor of every aspect of Blender like 2.5x series was.
But in 2.5x series, almost all releases were alpha or beta. The first stable release happened after 2 years of development.
This time, developers are trying to achieve first release of 2.8x series as a stable 2.80 after one year of development.
They are more numerous but Blender has grown during a decade between 2.5 and 2.8.
So, 2.80 UI was frozen before everything could be treated.
There will be some holes into 2.80 workflow : Vertex Alpha Painting, Easy Baking of textures, Baking of Indirect Lighting for animations, Overrides, etc…
But community will not have to wait one more year for a stable release allowing to use EEVEE and Grease Pencil objects for serious productions.
2.80 was announced for July. But amount of bugreports did not decrease in June. Maybe it will be released in August.
Some 2.81 targets have already be postponed : UDIM, overrides, etc…
Some ambitious projects like Mantaflow, Fracture modifier, or sculpt mode features are expected to merge quickly for 2.81 or 2.82.
2.80 release will continue to deliver a lot of feedback, and reports about undetected bugs.
So, devs will still have a huge amount of work after 2.80 release. Nothing is carved in stone.
But as something already partially present that need Viewport and EEVEE improvement, there is a big probability to see this fixed for 2.81.