MechaPilot
Explorer
You are only naming very easy things to do.
How about remove healing surges entirely?
Remove AEDU?
Remove most magical items.
These things are not so easy to remove to the point where it is close to impossible because they are baked into the system.
Removing healing surges entirely and removing the AEDU structure are both easy, and removing magical items is trivially easy.
Removing healing surges entirely:
Surges do not exist. A power that says the target can spend a healing surge has that text replaced with the target healing an amount equal to its surge value. Magic items that require the character to spend a surge to use, like potions, no longer require the spending on surges to use.
Now some people will say, "No fair! You kept the surge value in there! That's not removing surges entirely!" While I feel that's moving the goalposts because the surge value does not mechanically do the same thing that the surges do (the surge value doesn't act as a limit on magical healing, the surge value doesn't allow the character to recover HPs during a short rest, and so on), it's also easy to fix. The surge value can be replaced by 1d8 + 1 per level and still scale relatively well with the character's total HPs. It scales better if you consider the first level to be three levels (1d8 +2 +1 per level), but you can get around that clunkiness by adding an ability modifier instead.
Removing AEDU:
Removing the AEDU structure is in no way difficult, though replacing it can be labor-intensive depending on what you want to replace it with. That said, replacing AEDU with a point system is obscenely easy. Every use of an encounter power costs one point, and every use of a daily power costs three points; using at-wills are free. You then use those costs multiplied by the relevant numbers from the AEDU progression of the advancement table to determine how many points you have. That allows you to put all characters on a magic point or fatigue point system if you want to.
Removing magic items:
Just don't give them out. It really is that easy. The system math expects you to have them, but it's not as if you literally must have them. It just means that you use lower encounter level creatures, or less creatures than normal, or you accept that encounters will be slightly harder.