The real question is when? There's no point if they don't release it soon. But if they do it will lower the price of S7's too, which would be good for the consumer regardless.
The 4.1 was nice and quiet however, so there might be interest in ditching the S7 and going with Avalon until Bitmain raise the quality of their hardware for the home oriented user...
I don't know that they have a quality problem really. They had one where S7 some did not get full spec but they seem to have found how to fix it as they now have a batch of faster, and a batch of slower.
But overall they ship a TON of home miners and yes there are complaints. But people who are happy post less then someone with an issue. So I think what your seeing on the board is a tad twords the "bad" side of their production.
Well when i say that, i'm thinking about the cheap thermal dissipation design. Albeit better in the new S7 form factor.
The software being rickety at best and important feature are left out on purpose. For example, they removed Volt control on S4 in later firmware while its possible to hack it back in and it work just fine.
The software is ultimately low end, not very good. Compare it to the SP20.
The noise is bad, compare to Avalon 4.1, although with the fan control and low ambient temp, its not that bad, just not excellent.
The plugs are on top of the miner, so its harder to stack, if all the inputs were behind, they would be more manageable. Again this is worse with the S5 and i'm not sure with the S7, but still. Compare it to the other mentioned miners.