If the network had their way, the status quo would be maintained for as long as the show aired!
But the idea of a Trek ship with a constantly shifting and evolving cast would be cool. Keep Janeway, the Doc, Seven and Tuvok. Tom and B'elanna decide to settle on some random planet to raise their kid. Harry goes with the cos he loves Tom so much and doesn't want to be Forever Ensign (by this time Naomi is a 13-year-old Lt.). New aliens come on the ship, stay for awhile then go. Chakotay vanishes and nobody notices for three seasons etc etc.