avast new features works smoothly. It consumes less windows resources and It has a very fast scanner. Thumbs up for it. It must keep on that way! A good piece of cake! AV scanner cannot be a “Heavy trunk” because It could be compared to a kind of virus! Have a nice day! Best Regards.
Which ‘new features’ are you refering too? 
The last update one.Best Regards.
Program update?
Are you using the beta version?
Or you’re talking about detection (virus database update)?