Bloodstones feels bugged and the wording is confusing.
The talent is called “Bloodstones”, plural, so it reads like you should be able to use more than one. In practice it seems you can only use it once in combat. If that is intended, the tooltip/name should say that more clearly. If it is not intended, the talent is bugged.
There also seems to be a separate combat issue. Sometimes Bloodstones just will not work at all in PvP combat. I have even had it happen on a PvP target dummy. Right now it feels extremely clunky and basically not usable as a PvP talent.
If Bloodstones worked properly, it could help make Destruction Warlock more viable in PvP.
Bonds of Fel also needs a pass. The damage is so low that the talent feels like it is doing negative value. It is a wasted PvP talent slot at the moment.
Please fix both talents. They do not feel properly tested or considered for actual PvP use.