I'm failing to see how spending Focus tokens on attack makes the Defender/Rexlar any worse than another ship. I imagine most high pilot skill pilots will be spending Focus on offense vs defense, since that will be what the roll for first. Why is it worse for Rexlar than say, Wedge.
The thing about Rexlar you have to understand is that, it varies on when you should use his ability. You really need to know when to use it.