As I've pointed out in a previous thread, Side Step and Defensive Stance are bad enough that they aren't really worth using. The benefit is not that great unless you have a huge number of ranks (since upgrading dice does less to keep you from getting hit or critted than adding black dice), and the price is high: you spend strain *and* a valuable maneuver. Most of the time I'd rather spend a maneuver taking a guarded stance than using Defensive Stance.
Here's how I would house rule them in order to make them worthwhile:
QuoteSide Step: Once per encounter, you may take the Side Step maneuver, spending Strain up to your ranks in Side Step. Until the end of the encounter, the difficulty of ranged attacks against you is upgraded a number of times equal to the strain spent.
And same for Defensive Stance except with melee attacks.
I think this change makes Side Step and Defensive Stance about on a par with Dodge in terms of usefulness. Thoughts?