FS swaps can look cool if they are pat of a fluid trick I guess. Like fs swap to immediate 270 out. or the standard 270-fss-270. Or even switch on fs switch up on like a flat down.
Nothing looks worse than someone sliding a rail, looking forwards, and then doing like a 45 degree twister thing that somehow passes for a switch up. Doing a bs switch up feels so much better. It feels like you are actually doing a trick. Basically, like a fs 270 out, doing a fs switch up is not really adding anything cool to what you are doing, and usually is less stylish than just sliding the rail like you don't give a fuck.
just my opinion of course.