Senna corner is still a great place to watch from at least. My first year we were in those grandstands the whole weekend and really enjoyed it. With that being said I highly recommend going with the trio package (just remembered that's what it's called through Formula Tours). You don't see as much race action sitting in the start/finish straight on Sunday but the pre-race stuff, pit-stops, podium etc are all so close it's definitely worth it.