You said "Hezbollah has not been destroyed, but only weakened." But, based on the following items you listed, I don't think we can really say they have been "weakened."
IF (and I will say IF because nothing has gone into effect) this U.N. resolution is passed and IF Israel accepts it, Hezbollah will emerge with power it could only dream of.
Yeah, it will need to replace men and material, but those commodities of war are "easily" replacable, but the power within Lebanon and the rise of it's prestige in the Islamic world is incalculable. It is possible that Hezbollah could use this conflict to end up in political power in Lebanon and Syria and esp Iran can easily rearm Hezbollah.
A small paramilitary militia will be seen as having fought the "big bad" IDf to a stalemate in a full months worth of warfare (this will be the perception). Hezbollah will gain so much from this while Israel will be left with alot of questions and finger pointing.