What exceptions limited the effect of Lincoln’s Emancipation Proclamation?

I don’t believe the exceptions limited the effects of
Lincoln’s Emancipation Proclamation.  Lincoln was very clever in the exceptions he
placed in the Proclamation.  Lincoln only freed slaves in areas that were in rebellion
against the United States.  First of all, Lincoln did not feel he had the authority to
free all slaves.  He used his power as commander in chief of the armed forces to free
those slaves in areas in rebellion against the United States.  Lincoln’s main goal in
fighting this war was to preserve the Union.  The Emancipation Proclamation was one way
he tried to win the war.  Lincoln announced the Proclamation in September of 1862, but
it did not go into effect until January of 1863.  This gave the southern states time to
consider the Proclamation.  Lincoln hoped that some Confederate states would rejoin the
Union before January, 1863, in hopes that they could keep their slaves, since the
Proclamation would only affect states that were in rebellion against the U.S. on January
1.  If any of the Confederate states rejoined the Union before January 1, they could
keep their slaves since they were no longer in rebellion against the United States. 
Also, Lincoln purposely did not free the slaves in the border states because he feared
that if he did, then those states would join the Confederacy.  So, Lincoln’s
Emancipation Proclamation, because of its exceptions, was very effective.  It turned the
war into a fight to end slavery, giving the north more incentive to fight.  And with its
exceptions, it kept the border states in the Union.