Damage soaking:
It's really bloody strong. Makes completely afking at certain aggressive monsters possible without protection prayers. Takes away a lot of the damage monsters that hit through protection prayers deal. It generally makes defence worthwhile. The basic implementation of the stat is great. There are some things that could've been done better.

• It's not style specific, meaning that it slightly of throws the combat triangle out of the window by reducing all damage.
• It takes off all defence bonus instead of being specific to certain items. You can still get a decent amount of damage soaking in a void set while it shouldn't be very defensive at all.

Lifesteal:
For what it's worth, I really don't think this should've been made a stat. We currently have two ways of acquiring some of this bonus. One being an aura and the other being guthans set. The aura's lifesteal bonus is (or should be) disabled in PvP, making it even weirder for lifesteal to be a stat. Tampering with guthan's set is also something I'm sort of worried about, though I haven't tested the set. Removing lifesteal as a shown bonus would make room for splitting damage soaking into the 3 styles.

Both of the sets ultimately deal shit for DPS. What's the big deal.