You're last sentence seemed to suggest that the problem was more or less solved. Or at least that's what I thought.
Is it that the NetGear still hasn't taken the firmware update and you want help? If so you best bet is to go to NetGear's support site. Router's are quite different from each other, so it's hard to help unless you happen to have the same or very similar models.
If it's just the reach problem, not working well from your couch, then a firmware update probably won't help. Not impossible, but probably not.
It's most likely interference, or a weak signal. If you have a cordless phone near the couch, try moving it. Some of these operate at frequencies near some wi-fi bands and will cause problems if too close.
It's also possible that other wi-fi networks in your area are overlapping on the same channel. Most routers are set to automatic, and try to find the least used channel, but that does not always work. You should be able to set the channel manually. It's difficult to find out what's going on using an iPad, but there are plenty of computer apps that will scan the nearby networks and let you see the signal strength; if you have a computer or laptop with wi-fi.
If the signal indicator on the iPad only shows one or two bars, then you can try moving the router. Even rotating it (or the antennas if it has any) may help. The reception pattern is rarely a perfect circle.
Another thought is that the 5.8GHz band has less range than the 2.4 GHz bands. You can turn off the higher band on the Netgear, forcing the iPad to always use the more robust frequencies. Since your internet provider is almost alway gong to be significantly slower than the wi-fi network, this won't slow most things down. If you stream between your devices and computer on the network, it might slow things a bit.
That's all I have off the top of my head. And since I don't own a Netgear that's probably all I can help.