Edit addon: there's another thread on this page about 2010, and in the vein of novel-to-film here, let me say I am FLABBERGASTED by the number of folks weighing about how much they prefer 2010 to 2001 (emphasis mine.) Makes me think I was right all along in thinking 2010 should have gone more lowbrow, with the LEONOV crew trading shots with the Chinese expedition and Roy Scheider turning whatever convenient space pod was around into a deep space version of BLUE THUNDER, all the while muttering that he was going to need a bigger spacecraft.
Ugh. I never got the love for 2010, which puts extra pork into the term ham-fisted. A great example of a film talking down to the audience.