Having "buffs" from buildings while in your tribe is a great idea. It not only makes buildings more useful than "storage" and "comfort" later, but also makes it so that warring tribes later on have to scout out and see what buildings people have and what they need to attack in order to obtain the best victory possible. If the devs wanted to, they could make them scale towards zergs.... you know... hometeam advantage spiritually, mentally, and physically.

Not sure what I think about the time thing...
Half of me says it can turn into some bad harassment.
Half of me thinks it can give pvpers something to do.
All of me thinks it should wait until combat is "fixed".