Yes. The Series 3 has input delay. I recommend reading through the Series 3 manuals to get your information.
https://pae-web.presonusmusic.com/downloads/products/pdf/StudioLiveSeriesIII_OwnersManual_05042017.pdf
https://pae-web.presonusmusic.com/downloads/products/pdf/StudioLiveSoftware_ReferenceManual-EN-V7_29092017.pdf It does not have Soft-Patching for Analog Inputs.
It will have a form of Soft Patching via AVB / network input routing, but that will come in a future update.