Hi Buck,
I'm about to clean flash PE for the first time. I've had Wifi issues after sleeping since making the jump to 4.2; doesn't matter which rom I use. I'm currently coming from Mmuzzy's rom which is a great stock rom. I believe most wifi issues are 4.2 related and not due to roms. Here's hoping that PE has somehow fixed this
Wifi issues for 4.2 are being tracked here.
Issue 40065 - android - Nexus 4 and Nexus 7 Wifi Drops connection Android 4.2 - Android - An Open Handset Alliance Project - Google Project Hosting
Google is having a hard time understanding that this is not solely a Nexus 4 issue or a problem with users' routers. Waking from sleep doesn't not play nice with wifi on for most users running 4.2... this includes the vzw Galaxy Nexus.