Potion rework

I think that Minecraft's current potions system is great but it could use an update for example why cant you use cauldron to brew potion if you could you would be able to brew four potions at once witch doesn't sound like a lot but if you have ever had to brew a lot of the same potion at once then you know what I am talking about. also why is there not brewing stands in witch huts and there should be a few other potion in Minecraft I am making a chart below for below for anyone with ideas to add to it


 * 1) potion of fight [open for recipe] [I know this is similar to the Potion of Levitation but this ones a bit deferent it allow you to fly like your in creative for a short time period] - Deven.wilson27
 * 2) splash potion of milk [ recipe [ milk bucket + gunpowder ] [its a throwable version of the milk bucket that can be used to remove potion effects] -   Deven.wilson27