Well the cooldown change was off the top of my head, didn't really get a chance to test it myself as I'm at work so I'll look at it more tonight.
As for execute phase, any abilities that change priority on different conditions (say <20%) have multiple entries in the priority list, I just haven't gotten around to them all yet. Really the biggest change during execute is that wild strike/blood surge drop below cs/execute, so pretty much just bt/cs/exe.
When all is said and done the default priority list will mimic this as close as possible, though you can adjust to your personal tastes:
Code:
7 3.42 recklessness,use_off_gcd=1,if=((debuff.colossus_smash.remains>=5|cooldown.colossus_smash.remains<=4)&((!talent.avatar.enabled|!set_bonus.tier14_4pc_melee)&((target.health.pct<20|target.time_to_die>315|(target.time_to_die>165&set_bonus.tier14_4pc_melee)))|(talent.avatar.enabled&set_bonus.tier14_4pc_melee&buff.avatar.up)))|target.time_to_die<=18
8 0.00 avatar,use_off_gcd=1,if=talent.avatar.enabled&(((cooldown.recklessness.remains>=180|buff.recklessness.up)|(target.health.pct>=20&target.time_to_die>195)|(target.health.pct<20&set_bonus.tier14_4pc_melee))|target.time_to_die<=20)
9 7.98 bloodbath,use_off_gcd=1,if=talent.bloodbath.enabled&(((cooldown.recklessness.remains>=10|buff.recklessness.up)|(target.health.pct>=20&(target.time_to_die<=165|(target.time_to_die<=315&!set_bonus.tier14_4pc_melee))&target.time_to_die>75))|target.time_to_die<=19)
A 13.19 berserker_rage,use_off_gcd=1,if=!(buff.enrage.react|(buff.raging_blow.react=2&target.health.pct>=20))
B 10.90 heroic_leap,use_off_gcd=1,if=debuff.colossus_smash.up
C 7.79 deadly_calm,use_off_gcd=1,if=rage>=40
D 69.87 heroic_strike,use_off_gcd=1,if=(((debuff.colossus_smash.up&rage>=40)|(buff.deadly_calm.up&rage>=30))&target.health.pct>=20)|rage>=110
E 95.34 bloodthirst,if=!(target.health.pct<20&debuff.colossus_smash.up&rage>=30)
F 14.21 wild_strike,if=buff.bloodsurge.react&target.health.pct>=20&cooldown.bloodthirst.remains<=1
G 31.88 wait,sec=cooldown.bloodthirst.remains,if=!(target.health.pct<20&debuff.colossus_smash.up&rage>=30)&cooldown.bloodthirst.remains<=1
H 21.31 colossus_smash
I 24.12 execute
J 0.00 storm_bolt,if=talent.storm_bolt.enabled
K 59.89 raging_blow,if=buff.raging_blow.react
L 27.17 wild_strike,if=buff.bloodsurge.react&target.health.pct>=20
M 0.00 shockwave,if=talent.shockwave.enabled
N 6.96 dragon_roar,if=talent.dragon_roar.enabled
O 11.26 heroic_throw
P 5.29 battle_shout,if=rage<70&!debuff.colossus_smash.up
Q 0.00 bladestorm,if=talent.bladestorm.enabled&cooldown.colossus_smash.remains>=5&!debuff.colossus_smash.up&cooldown.bloodthirst.remains>=2&target.health.pct>=20
R 4.66 wild_strike,if=debuff.colossus_smash.up&target.health.pct>=20
S 8.69 impending_victory,if=talent.impending_victory.enabled&target.health.pct>=20
T 12.76 wild_strike,if=cooldown.colossus_smash.remains>=1&rage>=60&target.health.pct>=20
U 0.46 battle_shout,if=rage<70
Looking at this closer, rather then adding <20% abilities they just add >20% to all of the non execute phase abilities which will probably be easier. Will update tonight