New Courage will allow him to make a tradeoff between tankiness and damage at his will, enabling a very aggressive right-click based playstyle while Nine Lives is down. At the same time, Berserker's opponents will have better chance at shutting him down with STR debuff placed.
The above tooltips were saved from earlier iteration, so there may be minor difference in actual game.
God Hand used to allow Berserker to be practically an immortal for the rest of game when played by competent player, creating tons of space for his teammate. The changes to God Hand are aimed at allowing enemy team a time to retaliate after spending their resource on Berserker. At the same time, reworked Reincarnation attribute will allow him to not fall off as easily after life stock is depleted, with an incentive to staying in frontline and taking damage - smartly -.
The above tooltips were saved from earlier iteration, so there may be minor difference in actual game.