Be careful what you wish for, you just might get it!
For my requirements, Avast! Home is very good the way it is and while I would be very happy to see improvements in detection rate for all types of malware, shorter response time and faster on-demand scanning, I would not like to see any of these or other "features" introduced if they detracted from Avast's current medium-to-low on-access scanning resource usage level.
As to the Which is the best AV debate......some random thoughts.
Truth:
No software is perfect, there is no (absolute) best, there is only adequate.
Opinion:
It is unwise to use more (or indeed less!) than one resident-scanning AV on your PC. So we each need to choose one.
When choosing, it is problematic to compare free and commercial AV due to fundamental differences in the relationship between the user and the developer/supplier.
E.g. Norton AV vs Avast! Pro = fair choice, however Norton AV vs Avast Home = apples with oranges.
Devo sang; "Freedom of choice, is what you got", but generally, exercising choice is something we human beings are not very good at (which is why advertising is an "industry" rather than just a bureau for the publication and dissemination of product specifications), but we will nevertheless make a choice as best we can, given the rational, emotional, intuitive, aesthetic and other faculties at our disposal.
And if having made our choice, we discover that another human being who's found themselves in roughly the same circumstance, has chosen differently.......you know the rest.