My two cents: in terms of directionality, I've seen worse. Look up WNJN's pencil-beam, vertical-only pattern. There are similar goofy antenna patterns coming soon to locations near us.
Can't say I blame WWOZ for squeezing out as much power as they can, before they get even more hemmed in. Run a scan for all the 90.7 signals in La, including the CP for 33.5 KW over in Pierre Part (see above comment). Now throw in our soupy Gulf-influenced propagation. Sid Levet III (builder of WCKW) used to shake his head at how close the FCC allowed FM stations to be allocated along the Gulf; I wonder what he would think of the current hi-jinks.
An FM directional antenna doesn't require as much input power as a non-DA of the same ERP, as you are not allowed to throw that nulled-out power in a different direction (as you are with a "non"-DA). And they are going from a 3-bay to a 10-bay. Thus they may not need some big honker of a transmitter relative to what they may have now.
The smartest thing they are doing is staying on top of the Tidewater building in the middle of downtown NOLA. Location, location, location. Overall I think it's a good idea for 'OZ, and I congratulate Charles Ellis for some good engineering work.