Homecoming background: how Reverberations differs from canon

While I've been writing the latest Homecoming chapter it's occurred to me that it's reaching a point where there are things that may not make sense unless it's remembered that Homecoming is essentially an AU which follows on from Reverberations - my S5 "re-write".

So, for those who haven't read Reverb I thought it might be useful to summarise the key differences between Reverberations and canon.

( Summary comparison of Reverb and canon )