In few words with Vlk, he mentioned Zen is remaining with AVG because it has been so integrated already. No plans to add Zen to avast! though. So, that's a good thing, because I really dislike Zen thingie... Totally unnecessary middle interface with unnecessary extra clicks to reach stuff you want to use.
There's really two things about Zen:
1. The functionality to be able to manage multiple devices and products
2. The launcher app
In short, we like item 1. but don't like item 2. In fact, item 1. is what MyAvast account was in Avast 2014/2015 -- but more robust and polished, and we'd like to retain that and eventually bring it over to Avast as well. But we don't like the launcher (especially as a separate app) and will rather try to implement the functionality somewhere in the main UI.
Why Avast is second and AVG first?
Without going into too much of a detail, it's because AVG will gain access to some Avast features that we need to better control the sales flows (such as in-product messaging), and that's baked in the overall acquisition business case.
Thanks
Vlk