The issue of the blurry system tray icons, which was also present in version 1709 (and likely previous versions), is caused by those icons being "re-sampled and re-drawn" over time, which degrades their fidelity, instead of "refreshed or re-rendered" from scratch. It is annoying, but not as annoying as this system tray icon spacing/placement/disappearance bug introduced in 1803.
I've now reproduced the system tray icon bug on three different computers - my gaming PC which has the GTX 1080 in it, the Dell OptiPlex with integrated Intel HD 630, and this morning on a work PC with both Intel HD 630 and GTX 1050 Ti. On the work PC, I did a clean install of 1803 to a new hard drive.
With this problem so easily reproducible, I'm hopeful that it can be zeroed-in and fixed in a future build.