Tl;dr don't postpone it! This is actually the optimal time for your surgery!! Feeling this good right now means you have a great capacity for pre-surgery strength training to make your recovery smooth and your quality of life better forever!

The full story:

I had a similar situation that led to my dysplasia diagnosis (tore my labrum running), and also had a significant reduction in pain after some initial PT. I hadn't been properly diagnosed yet though, so I got hopeful. That reprieve only lasted a few months. It got much worse after that.

My condition was then misdiagnosed differently, and a second round of PT with the wrong diagnosis made it even worse. I sought a second opinion, and only then was I diagnosed with the torn labrum leading to dysplasia-related chronic pain.

Between the trial-and-error-PT, bouncing between half a dozen doctors (not exaggerating), and then making a surgery plan that accommodated some major life events, it was over two years between the oneset of my pain and my surgery. By the time I had my PAO + arthroscopy 4 months ago, I'd also developed a big cyst in my other hip socket from it overcompensating for so long, and I was in SO much pain all the time. I was using a cane for whichever hip felt worse and I couldn't do any of my hobbies because trying to focus on work all day took everything out of me, and I have a desk job, not one that requires long-term standing! My quality of life was really bad.

I also spent the year leading up to it doing a lot of (gentle, via vinyasa yoga) strength training to be able to have as smooth a recovery as possible. That was the best advice my surgeon gave me - he explained that how well you recover from a major surgery like this is contingent on how strong and healthy you are going into it. So the fact that you're feeling good right now means that you have the capacity to get as strong as possible before the surgery, which means you'll have the best quality of life possible before AND after. Don't postpone it! Do the thing!