I tend to use my pet for tanking when pve'ing and the removal of health funnel makes it very difficult to keep my pet alive. Having burning embers be the only way to heal our pet in destro is a terrible idea. The burning embers are for self heals and damage, and should never have been connected with healing our pet. having to use a burning ember just to heal my pet is bad.
I've noticed small issues like this with the warlock class this whole expansion. People keep talking about buffing warlocks damage but that's not really a problem. The issues warlock have are mostly Quality of life issues. Like health funnel gone for destro, which in turn makes healing our pet harder. There are other issues(Like how the abyssal is a worse tank than our voidlord)but I feel they are not related to how much damage a warlock can do. And those are the issues that should be looked into and fixed by blizzard.