You would prefer to keep all the advantages of the original 2nd Ed space station rules without having to pay triple cost plus 5 RR points per turn any more? 
About the first thing the chapter on space stations says is that it replaces the system in the main rulebook. Also note that other special rules which are kept are specifically mentioned.
Space stations do still have some advantages over ships of equivalent priority level. For one thing, they're indestructible. (Which I always found odd - it's supposedly because they're so big, but if Babylon 5 is about 8km long and is Battle level, a Patrol level station is probably no bigger than an Omega. Babylon 5 itself is a lot smaller than a Drakh mothership.) Also, you can customise the station by adding your choice of modules - it's effectively a ship which you get to design yourself. Interceptors are more effective because you can decide how many dice to use against each attacking ship, which means using something with popguns to wear down interceptors before firing the big guns won't work.

About the first thing the chapter on space stations says is that it replaces the system in the main rulebook. Also note that other special rules which are kept are specifically mentioned.
Space stations do still have some advantages over ships of equivalent priority level. For one thing, they're indestructible. (Which I always found odd - it's supposedly because they're so big, but if Babylon 5 is about 8km long and is Battle level, a Patrol level station is probably no bigger than an Omega. Babylon 5 itself is a lot smaller than a Drakh mothership.) Also, you can customise the station by adding your choice of modules - it's effectively a ship which you get to design yourself. Interceptors are more effective because you can decide how many dice to use against each attacking ship, which means using something with popguns to wear down interceptors before firing the big guns won't work.