After analysing VE in its current format (when talented you receive 25% of your dps as healing but your party receive 5%) I think it really needs to be revisted and changed.
I understand that allowing 25% healing to your party would lead to spriest raid stacking... obviously a bad thing to promote. But on the other hand, 5% healing is so trivial that it borders on useless. In it's current incarnation it's only useful for healing the spriest.
In some patchwerk encounters I managed to provide a total of 10K effective healing to my tanks in 3mins... like I said it borders on useless. Admitadly a change is comming where the duration will be increased to 5mins on PvE targets, so we dont need to waste GCDs to maintain it but i'm almost convinced that if i'm not going to take damage then I wont bother losing even 1 GCD.
I suggest we get it back to 25% but somehow limit the effect so it can't be stacked. Not entirely sure how to physically do that... perhaps there are some other ideas out there?