Take Step of the Wind. It can really seriously be helpful. I've made characters focused on battlefield control that take advantage that difficult terrain movement halving follows regular math (two effects reduce speed to 1/4, three reduce it to 1/8, etc...). Being able to ignore some potentially very nasty magical lockdown is a great trump card to possess. I suppose you could just punch the spell effect with Iron Heart Surge. But that only negates one spell effect, and costs a standard. Switching stances is a swift.
Only reason to not take SotW IMO is if you're certain your DM will never throw difficult terrain at you ever. Which might be true of some DMs...