Marc
the first hole at my Club (Blackwood) has a split tier green. The lower left is guarded by bunkers left and short, while the higher right (perhaps a foot higher) is guarded by an steep bank and hollow. The green is elevated on all sides, but is small (not much more than 3200 sq feet).
Why was this green designed such? Well, to solve some drainage issues, the green needed to be raised. But the left hand bunker was reasonably deep (for a members club) and so 25 years ago, they didn't want to increase the effective depth of the bunker. So, a green that used to slope left to right (and drain where golfers walked) now slopes right to left. The hardest play is from short, right of the green to any left hand pin (the mound, the downill tier, the left bunker and the steep fall-off at the back all come into play - let alone the penalty for duffing the chip into the slope in front).
Strategy is really different to the old hole, with the 'easy' bail out short and right producing the most challenging recovery. Right used to be the percentage safe play!
James B