There is one thing that I always come back to Blender 2.7 for and that is UV editing because Blender 2.7 had this awesome thing where you could force your 3D model to display the current texture that you were using in the UV editor. I always used that to display a checker texture over my model to check for stretching because really the only way to detect stretching is to look at the 3D model.
In Blender 2.8 I’ve found no easy way to display a checker texture over my model. I’ve had to assign the texture to the material itself and then replace it once I am going to apply the real texture.
I would really like an option to temporarily override the material with the active UV editor texture. It could be a shading option in the solid mode.