It is not a 3 to 4 round paralyze. It is 2 to 3 maximum.
Not sure what kind of "maladicts" they can lay down on your beyond demoralize. I guess if you consider trample as well...
Drinking of blood is actually kind of funny, because I use the oily wineskin and the bloody skin and elf locations to ambush and kill orcs looking for orc blood.
Spinebreaker itself, the debuff only exists on you for those 2 to 3 ticks, no matter if you are hit out of it or not. And it is not as bad as you are saying.
Success rate of spinebreaker is much lower than you are saying here WITHOUT the edge. Also, the lag on a failed one is 3 rounds, not 2 rounds, unless you have the edge. Spinebreaker is based around size, and you will see a dramatically lower success rate if you enlarge.
I'm not sure what you are talking about with all the worry about spinebreak, call in gank. Almost every single other class has an ability like that, with a higher success rate.
Last, you say "free" of charge. Which basically says to me you have never played an orc beyond maybe level 15.