Hi, you are not getting expert advice, I'm in software, not a mechanic and I have an 89, but here is my experience. First off, I feel like what you are describing is what I felt when I first got it back from the shop. I had a rebuilt put in and was thrilled I could drive it but was NOT impressed with the stopping power. I realize I was comparing it to my wife's 2016 Kia, but still. About two weeks out of the shop I had to slam because of turkeys (I'm in CT and they just roam wild) and the old girl stopped like a champ. Slamming them seemed to bring out the best in the brakes. Now the next week I'm at a bbq with an actual mechanic and he says, the fluid level can be low if the pads are worn, i.e. it takes more fluid if the pads need to travel farther. I thought millimeters wouldn't matter but topped off and the everyday performance got noticeable better. I read on this forum that changing the fluid is the single most important step you can take for prevention so after 24 months I go back (again, I'm not a mechanic so I pay for one's expertise) and he drained and put in new fluid. Since then I think the stopping is better. I don't know that I will go every 2 years, or maybe I learn how to do it myself, but my brakes have gotten noticeable better with the new brake fluid/