This question is slightly inspired by this one, in that it brings up the 4E module, Keep on the Shadowfell. It is common knowledge at this point that KOTSF is broken in many ways, the first combat (an ambush, go figure) alone is proof enough of that statement. Now, KOTSF has some merits to it, such as a well designed and thought-out base of operations, Winterhaven. I'd even assert the NPCs and story are pretty well done for a WOTC publication. That said, I am wanting to utilize this campaign when I drag some D&D-newb friends into RPGs but I don't want to throw out the baby with the bathwater, ie. scrap the whole module because of some (very) poorly designed aspects.
What fixes are there for Keep on the Shadowfell? These fixes or mods or what-have-yous don't need to be official WOTC ones, though that would be preferred. Is it even worth it to try and fix the module or is it beyond fixing without a lot of time intensive DM-effort?
On a side note: I have linked the free pdf version of KOTSF from the WOTC site above for anyone unfamiliar with it or needing a refresher with it before they respond.