Blood Bowl is in a much better position. It started quite awkwardly because the core (including teams) is almost identical to previous edition. So in the first year, it was some "new" releases, but it was mostly existing teams, stats, costs, skills, star players (special characters). A few minor mistakes were made (some examples):
- rolling on a D8 table was labeled "D6" (Chaos shaman). This was later corrected in compilation book.
- wood elf line cost was 7000 instead of 70000. This was later corrected in compilation book.
- Bloodweiser keg/babe quick reference card have incorrect cost.
- A star player had incorrect stats from another star player
For most seasoned players, these types of errors are quite easy to spot. Nothing major, nothing game breaking. If you want to play the core, the game is pretty much finished. Some teams not re-released yet may have minor tweaks to cost, positions.
In addition to the core game and re-releasing old teams and star players, they are also adding a bunch of new stuff, most of it is optional. Star Players now consists of a mix of new and old. Each time a new team is (re-)released, there is a bunch of additional stuff (inducements, dice, pitch rules, special ball rules ++). Most of this is without error! It mostly just works out of the box, no real issues at all. There have been some discussion on balance, but that should be inevitable.
I would say there are some issues with Blood Bowl that:
1) The cards are a "problem" that has gotten out of hand for blood bowl. We see an increasing amount of cards for Necromunda at the moment. Blood Bowl has 6 different types of "tactics cards", and multiple ways of drawing them before a game. The amount of cards are steadily increasing for each team. I believe there are currently 169 cards total. Too much! And the new cards are less original, giving some temporary skill to a player.
2) Inconsistency between teams. The first teams did not get the full list of additional content. The later teams have more additional/optional content from their Spike Magazines. For example Humans and Orcs from the starter box does not have their own pitch rules, wizards etc.
3) Same as with Necromunda, the amount of content is very high. Luckily Blood Bowl compiles almost all new content each year into Almanacs (compilation books). This is good, but you still need a bunch of books to have all the rules.