This would fundementally alter the game. Screeps is very much about power projection and regional ownership. Increasing creep ranges by a factor of >4x would mean that players can attack from an incredibly vast distance around them, and from many bases as opposed to only the closest ones. While more combat isn't necessarily a bad thing, this would vastly favor older, more entrenched players with large sprawling empires.
I think the downsides of this are too much. We are already (probably) getting a power creep with the renew ability built in that should in a limited & controlled way extend ranges much further. Portals already provide windows of opportunity for extending ranges too.