I think since fleet carriers are mobile, shuttles wouldn't be doable. Imagine someone calls a shuttle to your carrier and you jump before they arrive. There's no mechanic currently for "welp, you can get out here or pay for a ride back". Also, carriers can have a several different permissions settings that prevent anyone but the owner from landing, or just teammates, or just friends, or no one notorious, etc. I thought it would be great to get a ride to my carrier also, but considering those things I cannot see that happening.