Going from Cubase 7.5 to Presonus Studio One 2.6 - Insane??

Well, the grass may or may not be greener. My only suggestion since the work flows will be different is to give both an equal shot. What feels more in alignment with you should be a sign of how to proceed. A light version of cubase may be a better fit as well…

It’s just a software ya know. You and/or your clients make the music. I’ve only used logic, protools and cubase. The last two in that list I really like and I have heard really good things about studio one. You can’t go wrong with your final choice. The hardest part will just be deciding.