Wifi is not that big of problem and it will be fixed over an update. The overheating issue is due from people leaving it in direct sun light at hot temps for long periods. I have had mine out in the sun in normal use for me and no issues at all.
The overheating issues were primarily caused by iPad in direct sunlight. I'm going close this thread because there isn't sufficient & empirical evidence that supports these issues.
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Sent from iPad "which hasn't overheated once"