The drawing follows the select mode (vertex, edge and face). When edge selection mode is active the edges are shown with the themed color. When only vertex selection is active. the edges are shown a bit darkened. This was done so the user sees better in what mode the user is in, especially with the 1-2-3 shortcuts.

T67637: Selected edges hard to see with wireframe display in 2.80 added the difference for XRay.
Making this report invalid as it works as intended.

To me it just isn't worth it "knowing better" what mode we're in if we can barely see the selection. The points in vertices locations were always a good enough indication of vertex mode. And if it really was the case, then why did they remove the dots in the middle of faces in face mode? If anything, they made it harder to know what selection mode we're in. Also, why not make these same design changes in the UV editor to be consistent? Good that they acknowledged and fixed it for xray and wireframe views, but it is even harder to see in solid mode then it was to see in modes that were fixed... This is a bad and inconsistent design decision. I know you all are very busy, but it's just wrong to not acknowledge mistakes.

You can turn the center face dot back on by checking the "center" checkbox in the overlays drops down menu

Today I discovered that all this time I could have just simply toggled "Edge" in the overlays panel inside edit mode to get the edges highlighted in vertex mode like they were in 2.79. Why didn't anybody tell me that? 😃