When your natal Moon in fixed, mental, AQ progresses into mutable feeling-oriented Pisces, you may find your inner-feeling life is more relaxed and open, and also at the same time, more fluid and unpredictable. You may find that your heart is more open, that you are a bit less rational.
The wonder and goodness of progressions, and really the transits, too, is that as bodies move through the signs, your experience is cumulative. By that I mean that you were born with Moon in AQ, so you will always feel/know AQ. And when Moon has moved into the next sign, PI, then you now experience and integrate Pisces' qualities into yourself. After around 28-29 years, your Moon will have progressed through all the signs to your progressed lunar return, and you get reintroduced to AQ. You might experience Moon's progressed return back to its natal point perhaps three times in your life. So over and over again, you are becoming more varied and more whole and you progressed Moon integrates the entire zodiac into you. It's a lovely thing.
And I personally find Moon in Pisces a lovely thing, as well.
Enjoy.