That's not what I meant. By current app, I didn't mean Springtomize, I meant the current app displayed on the screen.
E.g. you're using an app but want to quit it rather than leaving it running (e.g. an IM app that uses lots of RAM & data). Currently, to do that you press home to exit, then double press home to bring up the app switcher, then close it (Springtomize already lets you close apps in the switcher without having to go into wiggle mode)
An option to make the current app show up in the switcher would mean you could bring up the app switcher and close that app immediately.
A small thing, but I think it'd be useful. I remember an older app switcher tweak had it. How do I ask the dev directly?