EDH / Commander rules for Emperor

Our group of friends has recently started playing Emperor format and we ran into a few issues when applying Emperor rules to EDH games. As a result, we have tried to compile a list of rules that answered our initial complaints. Do many of you play EDH Emperor and if so do you have any tweaks / additions / deletions for our list of rule modifications?

First, these were our initial complaints:
*Emperor was able to safely build up with impunity when we played Emp = Range 2, Lt = Range 1.
*Emperor planeswalkers were unchecked and snowballed out of control.
*Many EDH staples like "all players / all opponents" spells and effects seemed very underpowered.
*Game was very slow when everyone played their turns separately.

Here is our list of rules changes. please let us know what you think!

Magic The Gathering: Emperor Format
EDH / Commander Specific Rules

1) Life Totals
*Emperor – 30 HP
*Lieutenants – 20 HP

2) Teams share a turn and walk through each phase together
*Shared Combat phase means that Lieutenants declare attackers at the same time, then blockers are declared by the opposing team.

3) Influence Ranges
*Emperor – No influence on opposing emperor until a lieutenant has died.
*Lieutenants –Can influence anyone in the game, but follow attack rules when declaring attack.

4) Attacking can ONLY be done by the Lieutenants and they can only target their directly opposite target.
*EDIT: Emperors may attack at Range 1 once one of their Lieutenants has died.

5) Creatures may be marched between adjacent allied players during the “declare attackers” step of their offensive turn.
*Creatures must be untapped, not also attacking, and must not have summoning sickness when passed. Haste will allow passing a new creature.
*Passing does NOT cause creatures to tap.
*Defense may not pass creatures during an opposing team’s turn.

6) Planeswalkers controlled by Emperors are treated as central Lieutenants and can be attacked / blocked by any lieutenant without "marching" creatures to that "area."

Thanks guys! If you have played EDH Emperor and you love it, or if you played EDH Emperor and you hated it, please tell us why.