1. Re: ccab's point above.
Based on one night's experience, I haven't been able to repoduce that "not going into deep sleep after wireless charging" problem, with a good chunk of deep sleep over the past couple of hours, however within those couple of hours there has been about 10 minutes of a kernel wakelock that sounds suspitious - "PowerManagerService.Wakelocks". Also "msm_hsic_host", but I understand that's not specific to wireless charging - can be fixed by reverting to an earlier radio apparently but I'll hold fire before meddling. I'll keep a weather eye on both. (Nexus 4, Stock 4.3 Rom - sideloaded JWR66V - and stock kernel with that, rooted; checked this with Better Battery Stats).
2. Re: Battery temperature while on wireless charging.
Mine wavered between 26 and 40 degrees C (briefly getting to 40, but spending most of the time in the low 30s) last night while charging from 12% to 100%. Once it reached 100% (around 2am) it hovered at 100% til I took it off the charger at 7am, with charge kicking in and switching off every now and then - every 20 mins or so? During this time the temperature was fairly stable between 25 and 31 degrees. The charger was fairly cool to the touch this morning. (Checked these temperatures with Battery Logger).
Forgot to thank WibblyW for that Battery University link the other week - v informative
Back to point 1. - Just checked Wakelocks again - that PowerManagerService.Wakelocks thingy is ongoing and has prevented deep sleep for the past while. Odd that it didn't kick in for the first few hours of the phone being off power. Will add an edit to this post later if it ceases and allows deep sleep again.
EDIT - yeah, so a few hours later I've checked and found that the phone had begun deep sleep subsequently - currently PowerManagerService.WakeLocks have been active for 15.8% of the time since taking the phone off charge this morning. Not a critical problem, but not ideal either if it's not serving a useful purpose