Are concealment and mobility bad for melee?

I'd like to avoid anything more complicated then 1:1 trading. Overall, the effect is a bit of a power boost? Crusaders drop SD and pick up SH or DM or, if they dual wield, they also drop WR for TC.

Swordsages only gain access to WR, which I don't know why they lack in the first place.

Warblades gain access to some (Su). That doesn't seem like the end of the world to me.

Overall, no one has said anything leading me to believe this to be more then a minor power boost (which is the case for anything which allows you to customize to your abilities). I'm cool with that.