Hello, thanks for asking!
1 - The thunderchild may be broken right now as what I know, it has been broken for ages.
I do have plans to bring it back tho.. just not right now.
2 - The Red Weed has temporarily been reverted to the old system from the cylinders but it needs to be fixed.
3 - Also the new PIT will basically have much more function and look better and will have unscrewing cylinder and heatray and martians inside etc.