I started with Method 1 and immediately messed up when I removed the Ind.Applet. The keyboard indicator applet zapped over to the far-right and I couldn't move or remove it. Futzed with dconf Editor a while with no success but a tiny bit more idea of what's going on. Then finally got rid of it. After that I just started over using the great info shared here so far, to build a less cluttered and rearranged Panel using only the old Add To Panel applets. Later I may drag in some new stuff, put it in the Plank, or just remain content with the sparse simplicity of the old stuff.
Now that it's working well, I'm smiling at how much quicker and easier it probably would've been to use Method 2. But where's the fun in that?!
Anyway, thank you for the quick and detailed reply. I'm getting more excited about 20.04 Mate by the minute.