Had the right idea, but botched it.
Yes, the film obviously skipped over the Caveman thing because of Dalekmania, but that in and of itself was a wise decision to go from the introduction straight to The Daleks. The Cavemen story bores me, anyway, and I always skip ahead to the Daleks, anyway, and never feel that I've lost anything of importance. Had they just followed the scripts of "The Unearthly Child" and "The Daleks", the film would have been fine. All they would really have had to do is trim out the filler, combine or move around a few scenes, and it would have been alright.
Other than that, they kept everything else true to the series:
-The Doctor is a mysterious alien with a past shrouded in mystery.
-He's traveling all of space and time with his grannddaughter, "Susan".
-Barbara and Ian are school teachers who investigate their weird new student and get sucked in the madness surrounding The Doctor.
-They land on Skaro instead of Earth's distance past.
"All you have to decide is what to do with the time that is given to you." -Gandalf