Thank you for your review and visiting Japan.I am Japanese.
Your review is great!
I definitely like Fuji-Q high land (especially Eejanaika,Dododonpa,Fujiyama,Takabisha)
I went there this summer and there are so so many people.
Eejanaika feel me to be so danger for body but so funny.
Anyway you can get fast pass online before you go there.
https://www.fujiq.jp/ticket/howto/
If you could not understand how to buy fast pass tickets let me know.
I hope to come back to Japan.
Enjoy!