- Warp surge was nerfed to cap at a 4++ save (used to cap at 3++).
- Fly units now measure vertical distances when moving vertically
- Fly units only get to move over models and terrain in the movement phase. Charges, pile ins, and consolidates cannot move over models or terrain.
#2 above was a fine change to fly. What people were abusing here is they would deep strike fly units onto platforms that were 9"+ away from enemy models vertically, but horizontally were 0"-2". This was 'legal' since you ignored vertical distances and could easily make a 2" charge. Obviously, this was a STUPID abuse by WAAC players and I'm fine with the errata.
#3 above those really irks me. This change to fly was again due to fly unit abuse, specifically the slam captains that were going around the tourney scene. Slam captains were just jet pack captains with big melee weapons that used stratagems heavily to become pretty bad ass beat sticks in close combat. I believe eldar shining spears were also used heavily and contributed to the abuse of the fly keyword. However, what this means now is EVERY fly unit got hit with the nerf bat and this GREATLY nerfs close combat armies that were not abusive and actually needed the fly rules to remain competitive. Take khorne demons for example. Khorne is really good at offense but does not have resiliency. So most units only got into assault maybe once or twice if you were lucky. Most units did not have fly and required assaulting the various screener units used to bubble wrap juicy targets. The units with fly though are expensive and needed to get over the screener units and kill priority targets and quickly enough to prevent them from decimating you. This is now gone. You cannot jump over your own models or enemy models with demon princes or blood thirsters during a charge. So those units now find it harder to get into assault and are forced now to eat more shooting before they can naturally get into grips with better targets.
So long story short is while the big faq did fix some cheeses like the CP farming garbage and vertical movement idiocy, it overall sucked for demon players. I'm hoping the next chapter approved with lower some point costs on the nerfed fly models but I don't think GW even considers the collateral damage of their overarcing nerfs. I intend to email the faq feedback group to share my displeasure with the nerfs. I recommend you do the same: (40kFAQ@gwplc.com)