I am not sure exactly what you are asking, so I will answer as best as I can. First, if you are asking about routing, that is fine. I was going to go to SEZ, but decided not to pass through NBO for a number of reasons, not the least of which that there were riots going on at the time. It would have been an overnight stay and I just didn't want to deal with it. So I stayed in MRU for about a week and a half, then eventually went back for about 5 days. The one thing I have heard is that Seychelles is expensive, and there are few or no alternatives. They limit the number of tourists each year (I think to about 300k), and demand easily outstrips supply. This is not first hand, though, since I never actually made it there...yet.
I liked MRU a lot. People will say it's expensive, and it can be, but it doesn't have to be. Place I stayed at was about $25 a night, including breakfast. But if you want to go and drop several hundred a night, you can do that as well. The country is climatically diverse, and the center can get downright cold up near Curepipe. But unless you just have to go, you won't probably be there much anyway. Otherwise, it's the most perfect weather you can imagine. My second trip was in their winter, and it was maybe 70. First was in summer, maybe 80. Port Louis is interesting, worth passing through, but don't base yourself out of there. I stayed near Blue Bay, but most people stay either in the north west or north east. The beaches there are absolutely amazing, though a bit antiseptic for my tastes.
Culturally, it's mostly a mix of Indian, Arab, European, African and Chinese, with Indian being a very large majority. If you like Indian food, you will never want to leave. I highly recommend going to the markets and having all the treats. And they are cheap, so if you don't like it, toss it and try something different.
Finally, there are a lot of planes going from Mauritius to Seychelles, so I wouldn't worry too much about it. The airport is really a little hole in the wall, with a surprisingly nice lounge. Not quite as remote as Easter Island, but also not one of the hubs of the world. Getting a seat shouldn't be a problem at all.
Hope that helps, if you want anything else, you can email me.
Oh, and find out if you need a transit visa still for NBO. When I was going to go, you did, and iirc, it was NOT available at the airport.
[This message has been edited by Darren (edited 02-05-2003).]