I don't think it is too complicated. The rules are about as simple as they can get outside of generic one page rule systems. I am enjoying the way they have done away with templates; the shooting and
cc dice mechanic are similar. It all makes for an easier game to learn.
I think the problem is.
GW have slipped back into the old habit of players needing to reference multiple sources to make sure they have up-to-date rules.
Chapter Approved, Indexes should be free with a small charge to buy a sheet of easy peal stickers with all the Errata for your given Codex that are pre cut to fit nicely over the offending Codex entry.
Vim