Sigh, I wish I were seeing such results. I'm on cyproterone (which is supposed to be a stronger antiandrogen than spiro) and my testosterone is really, really low, yet I've only noticed minor change. My biceps are still... yeah, repulsive, my shoulders are still far from thin (though these at least have improved) and my trapezius muscles show but minor improvement. The only exercise I do is bring back the heavy bag from the grocery store, but hey, that's less than once a week, and only for about 10 minutes. :/
My estradiol does is awful, but I'd expect this kind of thing to go well at least. Nope. Super low testosterone and zero muscle training for, uh, ever, and still not-so-good results. Sigh.
If anyone ever tells you there are good sides to being the "wide and large" kind of person, they're lying or delusional. Seriously.
I can still hope it'll improve once my estradiol levels are in an acceptable range, but... Lately, life has been advising against that by crushing my hopes repeatedly for a few years.