I read the original Shannara trilogy when I was a teen, and started the next trilogy. Then I realized how much was recycled from the first series. In my mid 20s I went back and re-read the originals and was appalled at how bad the writing was.
Here’s a fun game: start with the original Sword of Shannara trilogy and count how many times the phrase “red hair flying” is used. Apparently there are more redheads in Shannara than Ireland, and there’s some unwritten law that prevents their locks from being cut or tied back, so everyone’s red hair just flies all over the place constantly. Never a mention of “brown hair flying” or “blonde hair flying”, so it must be a genetic mutation that gingers have developed, perhaps to attract mates.
I do remember thinking that Terry Brooks at least came up with cool people/place names. Of course I smoked a LOT of weed as a teenager so that may have colored my thoughts a bit.