Beautiful skirt and definitely ambitious and well executed.
Agree with everyone on Hong Kong finish next time.
As for overlocker/Serger - been sewing 50 years and still see no need. Overlockers are pricey things, I use a triple zigzag on casual wear and always a Hong kong finish on woolens or unlined jackets. French seems work well on some cottons and linens and such. I like to purchase 100% silk mens neckties at thrift stores for hong kong finishes - adds no bulk and they are already cut on the bias.
Under normal circumstances in the past, I would ALWAYS use rayon hem tape on such a skirt, but all I can purchase here in the states locally is a brand called Wrights. Where Wrights used to be excellent rayon quality in a wide color range, colors are now limited and the new stuff is a dreadful - TRULY DREADFUL - 100% polyester disaster that crackles while you are using it as it is so hard - good luck getting a needle thru it (I always hand hem) and the color can bleed easily. Never had polyester do such a thing.
So if I don't have some vintage hem tape, I use the recycled silk. We also have access to something called "Hugsnug", but I've yet to go this route.
PS: the old rayon hem tape was single layer and cut on straight grain. Machine stitched to upper edge of turned up hem and then slip stitched/ blind stitched by hand at the top. The weight transitioned the hem finish nicely into the garment.