&Beyond Safari to Beach Questions

I'm working with &Beyond to book our first Safari (honeymoon) and had a few questions. Our general itinerary is 3 nights &Beyond Bateleur Camp, 3 nights &Beyond Serengeti Under Canvas, 11:45pm flight to Seychelles, 4 nights at FS Mahe.

1. On arrival to NBO, they have us at the Crowne Plaza Airport hotel. Is this okay? I think we will be exhausted anyways and just want to rest before starting the Safari the next morning. Nonetheless, I'm open to suggestions.
2. Is the overnight flight from NBO to Seychelles (Kenya Airways) any more reliable than the morning flight? &Beyond has a note in their itinerary that this flight often has issues. My backup plan would be to book the Ethiopian flight leaving at 3:20am the next morning with United miles which would still get my into SEZ early afternoon the next day.
3. Is booking FS Mahe through &Beyond worth it? Are they a preferred partner? Their notes only say breakfast included, no upgrade/late checkout mentioned. Alternatively, I could do my own transfer to Seychelles and book FS through AMEX and get breakfast, potential upgrade and guaranteed late check out. UPDATE: Interestingly, the quote I got from &Beyond seemed to have an upgrade already priced in and confirmed. My 4 night stay at FS Mahe was $7800 in their quote, but was a confirmed Ocean View Villa. By comparison, that's how much the Garden Villa costs through Amex, Direct, and FSPP. Amex and FSPP obviously have "upgrade potential".
4. On departure from SEZ, I'm likely looking to fly through AUH. I see 2 direct flights, one via Ethiad in the AM, or one in the evening through Air Seychelles. Any insight on reliability? I would assume the Ethiad flight is more reliable, but its at 8:20am, leaving me sitting in AUH for 12+ hours. Alternatively, I could miss my second flight if the evening Air Seychelles flight has issues. So my question is, should I risk it for the evening Air Seychelles flight and have a full day at the beach, or should I late checkout from the Four Seasons the night before, get a cheaper hotel closer to the airport, and fly out on the early Ethiad flight?
5. Someone had recommended going to a private reserve such as &Beyond Klein's Camp so that we could do night drives and go off road. Overall less crowded is my understanding. Should we replace Bateleur with Kleins Camp?

Thank you!