I just attended my future sis-in-law wedding. I think separate day is still the best for those having church, tea ceremony and dinner. cos my sis-in-law and her hubby are so tired after their church wedding n tea ceremony. And the sis n bros are tired as they have to wake up so early. And of cos the parents will be very tired as well. and usually there will not be enough time to rest after 2 day-time sessions.
just that, PG, VG, and MUA usually will charge additional for their transport. no choice
As for myself, my church wedding will start at late morning then follow by tea ceremony. and i wan to have less stressful. and also can enjoy the hotel suit more... so chose to have it separate day....