Not to say RazPi ain’t cool, but have you ever thought about the Atomic Pi? $35... just saying

I agree about the WiFi antennas. All the forum activity around “WiFi connected-ness” makes this a compelling value add.
As for heat (and power) a quick (very) search showed that the RazPi had a TDP (thermal design power) of ~2w to 5w and the AtomicPi of ~4w to 15w.
I think augmented case cooling may be needed, but this also may be a feature that is at a “it’s time has come” point. Running a case cooling fan is pretty low power draw, especially if it is thermally controlled - no need to have it run on a cool day/night or when idle.