yeah, these ones both look nicer and do cooler things than in CivV.
though, are we certain that the Cliffs of Dover take up 2 hexes? They are cliffs after all, and therefore an edge of hex feature (vs use of hex).
Yes, the Cliffs have been confirmed as a two-tile wonder. See this screenshot.
I'll agree, however, that there are other cliffs just as compelling as those, or moreso. I suspect that the popularity of the (great) old song may have something to do with why they were chosen.