What am I wearing on Sunday? None of your business. Because it isn't a fashion show.
It isn't a private school with mandatory uniforms.
And it definitely isn't a venue for protest.
Do I care the most miniscule amount if you wear pants to church? No. I don't. And neither does anyone else. Except perhaps the really old school people. But they probably also hate that you use your iPhone for scriptures.
And even they don't want you to wear to wear skirts as a sign of submission. NO ONE DOES.
The idea behind "Sunday Best" is showing the Lord that you are dressing your nicest to dedicate time to worship him. If your nicest attire is a classy pantsuit, awesome. AWESOME. Wear it. Bully for you. No one cares. A lady in my ward used to and literally no one cared.
But pants will never be a sign of equality. Wearing pants is not going to mend this false sense of inequality and insecurity you feel in the Church.
The Church does not treat women unfairly. If anything we are actually shielded and protected from some of the tougher and rougher elements of life and responsibility.
If you feel unequal, I'd start taking a look at the people with whom you surround yourself. I don't doubt that there are men (and women) in your life that may treat you as subordinate or look down on you. Maybe even men in positions of authority in the local church.
But how many times do you need to hear that the Church is perfect but the members are not?
How many times do you need to read Alma & Amulek's sermon to the poor and rejected that weren't allowed to worship they way they wanted? (Thank GOODNESS they didn't have the burden of not wearing pants to deal with! Can you imagine?!)
How many times to I need to write snarky, unChristlike blog posts about these ridiculous Mormon fad groups?!!!!!
I'm wearing my nicest skirt to Church on Sunday. If you hadn't guessed.