Guess one difference is that new factions have more selection for their home system.
But Met has a point, apart from allowing new factions to take claimed systems as home systems, we haven't changed anything. There should be a limit so a single faction can't say "I own/claim/influence everywhere."
But would the following satisfy everyone:
1) A faction has one home system and (for arguement sake) MAY have up to 4 others claimed or "influenced".
2) The claimed systems must be connected to another claimed or home system.
3) Any new faction can select an available or even a claimed system for its home system.
4) Home and claimed systems can be moved as required. Each faction is allowed only one change a week, which includes the addition of new claimed systems. (Need some type of time restriction to prevent sudden shifts)