Hero Skill transfer

Thanks for increasing the rate of hero survival on skill transfer
but…
the uncertainity of it makes it a bit less meaningful…
so,
Suppose,
We have a good hero with two good skills and we want to transfer one…but because of the uncertainty we will have to use diamonds…
If
We transfer skill and the hero survives its no problem then
but if it doesnt survive
the system asks us to give Dais to retain the hero.
Like this it will be even more meaningful.