Then what's causing the slow down? What actually slows down? Can you actually measure the difference? Why does your phone slow down at 70 when mine runs fine with only 50m or less? And more importantly what does the system do when you free up that memory? (that's a trick questions

)
There isn't a single shred of evidence or documentation that confirms that freeing memory, before it's needed, does anything good for your phones performance. If there is please point me to it.
When and if the system needs the memory from those " idle, unused, unimportant apps" It will free them/it itself. Why do you think it needs help doing it?
Listen if it makes you feel good then go for it (
I don't want to argue with you Air I like you xxoo 
) but to me these things are a unneeded apps that take up memory and battery power for nothing.
I have installed it though and will let you know what I think in a day or two.