To what extent would you characterize the Constitution as a bundle of compromises?

Hello.

Yes, that would seem to be a fair characterization.

The Constitution did indeed involve a series of compromises:

(1) 
"The Connecticut Compromise -- The Great Compromise"
This was a compromise between the big states and the small states. The
big states wanted representation in Congress based on population. The
small states wanted equal representation. The compromise was a
bicameral (two house) Congress. The House of Representatives has
representation based on population. The Senate has equal
representation for all states.

(2)
"Three-Fifths Compromise"
This was a compromise between states with slavery and states without
slavery. The slavery states wanted slaves counted as part of their
populations for purposes of representation in the House of
Representatives. The non-slavery states opposed this. The compromise
was to allow slaves to be counted at 3/5ths of their actual number.


(3)
"Commerce and Slave Trade Compromise"
Some states wanted Congress to have control over foreign and
interstate commerce, but slavery states feared that this power would
be used to restrict slavery. The compromise gave Congress control over
foreign and interstate commerce, but that power couldn't be used to
restrict slavery prior to 1808

(4)
"Presidential or Electoral College Compromise"
Some delegates wanted election of the President by the people or the
states. Others wanted the President to be elected by Congress. The
compromise was the Electoral College in which each state has a
delegation equal to its total number of Congressional representatives.
Each state selected its own electors and the electors vote for the
President.

Sources:
University of Chicago: Genesis of Our Republic, cached by Gooogle:
http://216.239.53.100/search?q=cache:4Sg11B2YpIYC:cuip.uchicago.edu/~ldernbach/msw/xggenesis.pdf&hl=en&ie=UTF-8&client=googlet

American History Notes, hosted by housatonic.net
http://housatonic.net/faculty/ABALL/US1Notes007.htm

The Constitution: A Bundle of Compromises:
http://www.free-cliffnotes.com/data/ab/aky88.shtml

search strategy: compromises, constitution, connecticut, "three
fifths", "electoral college"

I hope this helps.

Thank you.  Your answer is very helpful.