I've been skating most of my life. For a long time, I'd plateaued in my skating. But then I started dropping eyelets during practice just to see. Skip ahead in time and now I'm practising with my laces undone, and what a huge difference it has made. Yes, at first, I felt a bit slower, but then as I got used to it and my edges got stronger, it felt like I was getting into a better posture and getting better extension. Generally, I'm feeling the ice better, and that's allowing me to get better.
When the world isn't ending, I'm playing games with looser laces. The laces on the top three eyelets are, for the most part, only there to keep the boot from spreading open. Otherwise, they don't provide much/any support for me.
For me, it was short time pain by sacrificing that ankle support, but it's been long time gain, because once I got used to it, I'm a better skater for it.