The problem with your suggestion is that not all Mint users would want the apps you list. I, for one never use any of the four and would need to go to the extra effort of uninstalling all four along with the stuff I uninstall now.
Most people who make suggestions about how to make Mint better really mean "This is what I would need to make Mint perfect for me."
It makes little difference anyway since the software list is determined by the development team in accordance with clem's outline of the direction in which he would like Mint to grow. User suggestions may be considered especially if there is a great deal of support evident, but no app will be added without being approved by the dev team and, of course, clem has the deciding vote.
Registered Linux User 483387