I have to agree it is pretty muhsy.
One contributing factor may be the calipers are larger and also have 4 pistons up front . This combined with the added pressure on the brake lines it will cause flex. I am trying to see if we can get the 95-00 model a set of braided Stainless Steel brake lines so that it will reduce the vague feeling.
I have them on my other cars and the SS lines are the best for added pressure .
Anyone ever notice that if you let go and press the pedal again real quickly the brakes will stiffen up 3-4 X more?
Usually that is from either a bad proportioner , bad booster, or sticking brakes or mushy brake lines.
Try it and post back.