New Tau Codex: biggest changes

Tau Pathfinders. Source: http://eastern-empire.com/gallery/urban-tau-cadre/

New Tau is finally here! The shiny hard-cover codex book is written by Jeremy Wetlock, who runs the column in White Dwarf and apparently been with GW for a long time. Codex itself is full-colored 100 or so pages book with easy navigation, plenty of images and background on each old and new units, heroes as well as new influx of background information on Tau Empire itself, their Septs and Heroes. Book is priced at £30 in Uk, and well worth buying just to have it on the shelf or battlefield.

So what are the biggest changes from the old codex:

1. Hammerhead and Sky Ray are BS 4.
2. Fire Warriors and Pathfinders are Initiative 2 
3. Drones may mix and match between Shield, Markerlight and Heavy Guns in one unit.
4. Drones are Initiative 4. 
5. Snipers are BS 5 and may have up 6 Marksmen with up 3 Sniper Drones each. Oh, Their weapon is a Rapid fire AP5. Did i mentioned the markerlight and Support fire?
6. Vespid are Initiative 6 and will ignore difficult or dangerous terrain. 
7.  Support Fire special rule allows you to fire Overwatch from friendly unit in 6" as well as from unit being assaulted. With certain abilities or Heroes Support fire may be fired by vehicles!  
8. Markerlight will grant one of the following: +1 to BS, Ignore Cover saves, fire a Seeker missile without reducing the amount of weapons vehicle can use, add +1 bonus for each markerlight to Overwatch BS.
9. Kroot finally got an armor. 6+ armor is a Kroot dream come true :) 
10. Most Battlesuits pack twink-linked weapons, but majority is still BS 3. 
11. Fire Blades are nasty! Veterans of Fire Caste they almost rival Space Marine Captains. They are 50+ points upgrade for Fire Warrior and allows extra shots or re-roll 1 to hit. 3 Wounds. 
12. Rippertide Battlesuit is a Mounstrous Creature with Toughness 6 and loads of weapon choices. Main bonus Nova Reactor: allows you either extra shots with twin-linked weapons, 4d6 evasion maneuver, overload with big "kaboom", or improved AP.
13. Flyers are here. Bomber and Fighter both at BS 3, 2 HP and ability to take 4+ invulnerable save against incoming fire. 
14. Heroes: as well as Farsight, Shadowsun and Aun'Va (last one is even more useful than ever), there is a master Pathfinder, super tankman at BS 5, Tank hunter, Support fire and Overwatch, and Ethereal with WS:5, I:5 A:4. He either goes Rending or chopping, especially against the Orks. 
15. Last but not least: Warlord Traits. 6 unique Traits, with 3 out of them may be used once per battle. They demand and intelligent play and understanding of your army. Traits may give your units Skyfire rule, extra shots, extra move or morale bonus.                           

In conclusion: most of the units remained as they were, or even less hard, but the difference is army cohesion, support and firepower. Tau will demand intelligent play, careful positioning and support from each other. Only then they will be victorious.