I have always thought blown saves when presented as a percentage should have a denominator of saves + holds. Getting a blown save in the 6th inning is really just blowing a hold. The stats on saves and holds and blown saves are scattered in various sources, but here are the Phillies presented as a percentage of saves and holds.
Neris - 7 BS, 12 S, 10 H = 76% success rate
Kennedy - 3 BS, 6 S + 67% success rate
Kennedy (whole season) - 4 BS, 22 S - 85%
Alvarado - 3 BS, 5 S, 14 H - 86%
Suarez - 3 BS, 4 S, 0 H - 57%
Bradley - 3 BS, 2 S, 11 H - 81%
Coonrod - 3 BS, 2 S, 7 H - 75%
Brogdon - 4 BS, 1 S, 11 H - 75%
Hammer - 1 BS, 0 H - 0%
Romero - 0 BS, 3 H - 100%
Falter - 0 BS, 2 H - 100%
Kintzler - 2 BS, 2 H - 50%
EDLS - 2 BS, 1 H - 33%
Hector is not quite as good as I thought he would be and of course Kennedy was great in Texas. I just still think recent trends are such that Hector should close. Alvarado and Bradley look decent in these stats though I guess they might have been saved by others who got outs and stranded their runners. Coonrod and Brogdon have a lower success rate and should stay in the middle innings.