Jason,
I think how much is "too much" of a good thing can vary a lot. For me, as I mentioned earlier, it would take a lot of optional angles of tees to be "too much". Other good things like firm and fast conditions are even moreso in that direction. It is almost certain possible to get a course so firm and fast that it ceases to be fun but we'd have to be talking way, way, way firm and super, super fast for that to even enter my mind.
Other things, like blind shots, are easier to overdo in my opinion. A blind approach or two over the course of a round can be exciting and the odd blind tee shot is generally OK although not my favorite feature. But if half the Par 4/Par 5 tee shots and every third or fourth approach were blind I'd be waving the "too much" flag.