Mostly unique, I'd expect.
Okay, for those who flat out want friendlier multiclassing (to the extent that until we get a _lot_ more feat options everyone pretty much will do it since feat options are just bleak at the moment):
Add additional options for the initial multiclass feats or add these entirely to the benefits of following a paragon path:
Cleric - Healing Word 1/enc
Fighter - Mark on hit, attack when attack someone else
Paladin - Div Challenge (Cha mod dmg)
Ranger - Gain Twin Strike as an at-will and the ability to use a one handed weapon and count it as an off hand
Ranger - Gain Hunter's Quarry for +2 / +3 / +4 feat bonus to damage 1/rnd.
Rogue - Gain Sneak Attack for +3 / +5 / +7 feat bonus to damage 1/rnd.
Warlock - Curse for +1 / +2 / +3 feat bonus to damage 1/rnd. Also, may get Pact Boon 1/enc.
Warlord - Inspiring Word 1/enc
Wizard - Spellbook for Wizard spells only, bonus rituals with ritual casting (if/when the character gets it), and cantrips
Wizard - Gain one wizard at-will
Those are the full benefit - no skill training, none of the normal benefits, and you can't take multiple for the same class.
Add an additional multiclass feat type:
Basic Power
[Multiclass At-Will]
Prerequisites: Any class-specific multiclass feat, 1st level
Benefit: You can swap one at-will attack power you know for one at-will attack power from the class you multiclassed into.
Modify Novice Power, Acolyte Power, and Adept Power with the following templated change -
'Benefit: You can swap any number of *** powers you know for *** powers of the same levels or lower from the class you multiclassed into.
That should 'solve' the following 'problems':
1) Qualifying for paragon paths
2) Actually being able to fulfill some aspect of the other role - like multiclassing into fighter or paladin would let you be a defender some, whereas it really doesn't at the moment.
If you want to get cheeky with it, let the half-elf Dilletante power able to be swapped out for a full at-will power with the basic power feat