As Okwolf suggested: Vore/Swallowing speed adjusments would really, really be awesome. I would really love to lower those and drag this out, enjoying the joyrides through all of Fens internals. Maybe with some interactions like struggles, bumps, even slight crawl/fight-baxks possible.
Other than that, you are on an awesome way now and really love how you go ham now!. Expect another buy next month ! <3