It has been a while now since the first request was made to include NGINX in this stack.
Has anything happened?
I find out that more and more companies are now requesting fast and lightweight system using NGINX/PHP5-FPM along with any other caching systems.
It seems that Apache becomes a dinosaur and it might now be the good time to offer this for developpers.
Don't forget that as a developer and main contact for customers, we are in good position to promote Softaculous applications to their existing systems, providing Softaculous with more revenues. I think it would be fair that in exchange the Softaculous development team moves into higher gears and work on this.
I much prefer using Softaculous than Installatron.