I think is very easy to perceive why ex-TD 27 is making a great comeback and the ETLPS* is almost devoid of any convection. 27 is located in a very moist environment, ETLPS is being killed by lots of dry air going into its core. 27 is located much more south than ETLPS, therefore at this time of the year, conditions tend to be more favorable in lower latitudes than in higher.
* = Extratropical Low Pressure System