I believe all FX like reverb, delay, chorus... are just built in to showcase the presets. If you like them, use them. If you don't disable them and use your own. Then you can reroute them any way you like.
Twin 2 didn't even have any FX besides its elaborate delay, which is awesome and is still there.
[edit]exceptions are those megalo-hyper-synths like phase plant and the like.. I guess you're supposed to do ALL sound design in-the-box with those. Don't like/use them at all