While giving a free Expertise feat is probably the most common house rule ever, I don't agree that giving a Defense feat is either a priority, or even necessary in the first place.

Why? Well, if you don't give them for free, every character (except Lazylords) will eventually take the Expertise feat, usually around the end of heroic tier. On the other hand, if you don't give them for free, many people won't bother ever picking up Improved Defenses, because it isn't all that impressive for many kinds of character.

If you take an average level-11 character, it'll have seven feats; almost universally, Expertise will be one of those; and also almost universally, Imp Defenses will not be, because there are many better feats.