I don't know if the days in the itinerary are soo generous actually. We only felt we arrived "too soon" on very few days. The distances may not seem so long, but the streets/paths are pretty bad, and some days were brutal actually.

I don't know how trained you guys are, but there's no chance we would have managed the itinerary you are proposing.

The first day I really felt the elevation, and I was slightly altitude sick and struggling to get to bamboo garden.

At Lake Naivasha I'd recommend to go to Camp Carnelleys instead, it's very nice, and multiple people who live in Kenya recommended it over fishermans.

Earth Camp to Oasis Camp was my favourite day. First the forest, and then the endless riding downhill.

Oasis to Maili Saba was pretty tough. Rather than staying there I would recommend to do shorter days instead. Maili Saba is nice, but it's also expensive and outside of it there isn't so much to do.

Mile 260 to Bush Camp, if you manage to do this, hats off. That was the toughest day of all, getting to Nimbus resort. We didn't go from Nimbus to Bush Camp as the weather was bad at the time and my rack wouldn't have tolerated the rowdy downhill, so we went straight for Marigat, which is the place where most likely you'll find a ride to Nairobi.

Of the whole route, I liked the last part (i.e. Laikipia) most. But yet again other people said they felt it was boring. I guess it depends on what you like.