Hey, thank you for the feedback! With Creative Burst, it raises the probability of successful research until you are successful. So if research gives you a recipe or upgrade points (what you get if you aren't at a high enough skill to unlock a new recipe), the probability resets to default. I will make that more clear in the levels display for that upgrade and the description. I agree that it saying it's level 400 doesn't make sense if it's basically not applied anymore.
I want to make it more clear about the recipes being baking level locked, but will have to think about how best to communicate that. Perhaps the bigger issue is that the recipe's level lock goes too high and creates a lull in the late game. I will try tweaking the numbers on the unlocks as a starting point.
Thanks again for the detailed feedback, it helps a lot!
Edit: I uploaded a build just now that should address clarity in the Creative Burst and speed up the late game slowdown. If you have time, I'd love feedback on the changes!