As written, Forcecage already enjoys several powerful advantages over Wall of Force:
1) It's duration is x120 longer. A Sor/Wiz could Forcecage someone, get his full complement of spells again by resting, then open up a can of whoop-ass.
2) In the block variant of Forcecage, all six sides of the subject are blocked. Therefore, no ethereal escape and no burrowing out (a la' Xorn movment).
3) In the cage variant of Forcecage, if you trap a powerful melee foe (e.g. Giant) then you can blast him through the bars with impunity and laugh.
The lack of saving throw in Wall of Force has stood, despite a second printing and errata of the PHB. I wouldn't hold my breath for a reprieve from Wizards. After all, that's what house-rules are for.