proposed multiclass feat system

i wonder whether this method might be more effective . . .

I. one multiclass feat to rule them all:

i) choose one of any class skill;
ii) ability to use all class weapons or implements;
iii) access to any class feat; and
iv) access to any class paragon path and epic destiny.

II. one class powers feat:

i) ability to use one encounter, daily AND utility power of the class; and
ii) prerequisite of the multiclass feat.

III. one class features/powers feat:

i) choose one class feature;
ii) ability to use one at-will power, and a second encounter, daily AND utility power of the class; and
ii) prerequisite of the class powers feat.