Lets not talk about the pro’s and ‘or cons of other timings . lets simply try deal with the practicality of the 18d time. Example: Iftar: 9:20 Finish Magrib & sunnahs: 9:35 Leaving Large masjid: 9:38 Getting home: 9:45 Esha Azaan: 10:25 Esha starts: 10:35 Tarawi and Witr ends (based on 1 para): 12:10 Leaving large Masjid: 12:17 Getting to car and driving home or walking home: between 12:20 and 12:30 Approx 25 mins to get ready for tahajjud/duas and eating suhoor Suhoor 12:55am That is just very hard to do..unless you either bring esha even more foward slightly or get speedy reciters in tarawi.