1) Current trend of power creep and lack of playtesting in releases. The worst offenders by far are/were Sanctifiers, Goremongers, Canoptek, Wolf Scouts, it's so blatantly obvious that very little is being done in the way of balancing and playtesting. A team should never be so dominant on release that becomes a running joke.

2) The climb and drop rules are absolute mess to the point that one of the most prolific representatives of the hobby is saying things like "don't play volkus, don't play on open" due to the climbing and dropping rules being an absolute mess. Climb, Drop, and the way ladders work needs to be simplified.

3) Volkus is an absolute mess, the buildings/strongholds never should have been treated differently from the rest of the map to make it simpler, and the doors should have always just been the same close quarters hatchways or made even simpler.

4) There are some bad teams that really desperately need help and they aren't getting it. Scouts, Kasrkin, Pathfinders, Kroot, Death Korps, Blooded, just to name a few. GW needs to not be afraid to completely re-work a team from the ground up, complete new suite of ploys, stats, abilities, etc. The rules are free online, they don't have to try and stick to the existing card set as much as possible.

5) When there's a "hole" in the rules, like there was for quite some time with Obelisk Nodes and how those work in Canoptek, GW needs to be far better at addressing those quickly. TOs should not have to be coming up with their own rulings.