Reaper's Arcane Circle and Plentiful Harvest is another. You use 1 to literally enable the other... it seems really odd for it to be another button. And that one isn't even a GCD lock or oGCD Weave; you use it once the duration ends and its on GCD so...
I mean yes, Reaper isnt extra Button Bloated like the likes of AST or SAM, but it's still an odd choice.