I have a suggestion I really like avast but it would be nice to have a new GUI or just a new interface with (more colors)
You don't say what avast version you have as there are different colour schemes for the free version against the paid versions.
They have a new GUI, that is what happened on the release of avast 2014 (a.k.a. 9.0), so I rather doubt they are about to change that any time soon.
Personally I don't care much about aesthetics more on functionality and there is much they can do to improve functionality in the GUI, as it isn't anywhere near intuitive as previous avast versions 7.x and 8.x. That is certainly something I would like to see along with many others and we have many topics on this, but no indication that this will change.