Concur, with a few exceptions:
The wobble is proterberance. Something that has been known for a long while. The Earth is not perfectly spherical and continental land masses affect the shape of the earth. The heavier the land mass, the more it sinks. This is true for glaciers as well.
The Earths core is solid. Known since 1936 when seismic frequencies were reflected back to the surface. It is the conjunction between the solid iron/nickel core and the fluid core that causes the magnetism and their polar qualities. Without this magnetosphere we would all be subject to cosmic radiation and our atmosphere would be stripped away, much like Mars.
The solid core is theorized to be increasing, decreasing the fluid core. This entropy will eventually solidify all magma and cause the magnetosphere to cease, effectively killing the planet. Time frame for this is 100’s of thousands of years. The Lord will make His return LONG before that happens (hopefully). But from a Biblical perspective, they could coincide, implying that the cooling rate of the fluid core is much faster than theorized.
Same here, if I may. ;-)
I lean toward the earth's solid iron core rotating within electromagnetic waves emanating for our sun as also a candidate mechanism behind earth's magnetic field generation and might explain why low solar activity also affects earth's magnetic field strength.