Dude you should not be getting any kind of PUMP from a warm-up. They should not tax you. The deal is not that the warmups didn't warm you up but that they are more than necessary (weight wise). With what you are doing on squat, for instance, you may be able to put 10 lbs a session on instead of 5 because those warmups "count". They are basically a workout plus an additional three sets of 5.
IK, I like the 5,3,1 setup. It's the percentage of target weight I'm reacting too.
And I don't have any theoretical dislike for the single weight above (although it won't work for everyone). And frankly, with lower frequency it wouldn't matter as much. But on this setup a warmup like that is, in effect, increase the volume. Once you add up all the sets and the percentages you'll find a relative intensity that is quite high so the volume at that intensity will be contraindicated for Rippetoe's. It will require more resources as far as recovery and thus speed of progression and time in progress will suffer.