If you can still get to it, with all the building work that's been going on there, i'd say the Old Hairpin is the best place. You get a great view of the cars coming down through the Craner Curves, through the Old Hairpin and then back up towards Starkey's Bridge. You may even catch a glimpse of them going up the hill towards Coppice too (not sure if you still can with all the earth moved.)
The banking on the infield alongside the exit of the Goddards chicane is also worth checking out (as long as they haven't built temporary stands there) You get a view of the cars coming down the back straight, through the chicane, and down the start/finish straight (with a gap in between whilst they do the Melbourne Loop if it's the full circuit) Crowds permitting, from that banking you should also be able to see most of the action from between McLean's and Coppice too at the far end of the circuit.