For your first two points, I think you figured it out in the last paragraph. I would love to be able to make each animation 200 frames long and have multiple stages to the scenes but I am the singular dev, I work a day job full time, nearly everything ins hand drawn and animated, I am on a weekly update cycle and just to remind you, this is only the second update. After a couple more weeks, once patrons have a bit more faith I put out consistent updates and won't run away with their money, I'll switch over to monthly releases which will allow for bigger updates and more ambitious animations. But I think the key is:
Have realistic expectations! I wasn't working at it constantly but it took me around 6 months to get to releasing the first build.
For your last point, I will be allowing the player to change the names of things in the future. Also, the plan for this game is that it's animations and code will feed into a larger, more story-driven game where there will be time for setting up the Witch as falling behind etc. The scope for the potion room is deliberately small.