I guess it's a little unnecessary to also do this from dash electrum but OTOH maybe these extra privacy features bring a certain type of user to dash electrum? I mean, the more dash electrum differentiates itself from the DCG wallet, the more users it's going to get. Or maybe there is a way to simplify the atomic swap process further, like some kind of automatic pairing? - I haven't really thought that part through but maybe it gives you some ideas.
Anyway, I'd be interested to see extra privacy features that DCG is unwilling to put in their own wallet.