Changes were made to all shouts found in Skyrim. To get an overview of what was changed, take a look at this:
Every row beneath the shout's name stands for the word it affects, i.e. 1st row 1st word, 2nd row 2nd word, 3rd row 3rd word.

[Animal Allegiance]
magnitude - level 20, duration 60s, 15s cd
magnitude - level 40, duration 90s, 22s cd
magnitude - level 65, duration 120s, cd 30s

[Aura Whisper]
10s cd, duration 15s
15s cd, duration 25s
20s cd, duration 40s

[Battle Fury] vanilla magnitude was fine
15s cd
20s cd
25s cd

[Become Ethereal]
10s cd, 18s duration
15s cd, 25s duration
20s cd, 35s duration

[Bend Will]
2s cd, rest unchanged
20s cd, 2 minutes duration
55s cd, 5 minutes duration on human, dragon unchanged

[Call Dragon]
3rd word changed, cd set to 120s

[Call of Valor]
45s cd 90s duration for all 3 words

[Clear Skies]
unchanged
7s cd
10s cd

[Cyclone]
cd 20s, 175 damage
cd 25s, 375 damage
cd 30s, 600 damage
[Disarm]
same level caps as
animal allegiance
cds set to 15s, 20s, 30s
[Dismay]
Same as animal allegiance, levecap for 3rd word is 80


[Dragon Aspect]
Effect unchanged, duration set to 10 minutes
Since it's measured in real time, it's adequate for a shout
that can only be used once a day.
1s cd on other shouts

[Dragonrend]
durations changed - you can use 1 shout in between when you have a blessing of talos + necklace
20s, 15s cd
30s, 18s cd
40s, 22s cd

[Drain Vitality]
first 2 words: duration halved, magnitude doubled = same effect
3rd word: 30s duration, 20 hp/s, 10 magicka + stamina/s
cooldowns: 15s, 20s, 25s

[Elemental Fury]
magnitude unchanged, durations:
20s, 12s cd
25s, 15s cd
30s, 18s cd
I will not change it to be usable on enchanted weapons.
It feels unbalanced and does not seem like a bug to me,
despite what others say.

[Fire Breath]
15s cd, 190 damage
20s cd, 450 damage
25s cd, 750 damage with afterburn - 35/s for 7s

[Frost Breath]
15s cd, 95 damage/s 2s duration, 70% slow for 5s
20s cd, 225 damage/s 2s duration, 75% slow for 5s
25s cd, 350 damage/s 2s duration, 90% slow for 7s

[Ice Form]
20s cd, 35s duration
25s cd, 45s duration
45s cd, 120s duration - 12 dmg/s

the third word is ways stonger because every additional damage still breaks the effect.
since you need longer to get rid of other opponents on higher levels, this is the only way to
adapt to difficulties of master or legendary.

[Kyne's Peace]
see animal allegiance - shorter duration than vanilla
but higher magnitude - fair trade

[Marked for Death]
20s cd, -125 armor for 60s, 120 damage over 60s
25s cd, -200 armor for 90s, 210 damage over 60s
30s cd, -300 armor for 120s, 300 damage over 60s

[Slow time]
A shout i never used since the slow effect on my chacter always annoys me so much,
that i quit the game, none the less i changed it. give me feedback on this one since i don't know if it's okay. it should work the other way round, you get faster while the others stay at vanilla speed.

18s cd, 15s duration, set to 75% slow (vanilla = 70%)
22s cd, 20s duration, set to 85% slow (vanilla = 80%)
25s cd, 25s duration, set to 95% slow (vanilla = 90%)

[Soul Tear]
stagger increased for first two words
damage set to 650 for 3rd word.
Soul Trap time set to 120s
cd: 2s, 3s, 25s

[Storm Call]
duration set to 120s, lightning damage = 75
duration set to 175s, damage = 125
duration set to 240s, damage = 160

[Summon Durnehviir]
3rd word 60s cd

[Throw Voice]
Range increased to 450ft ~ 135 metres
cd set to 5s for all words

[Unrelenting Force]
Ever wanted to know what it means to fly?
cd 10s, 30 damage, hard stagger (more than vanilla for 2nd word)
cd 15s, 60 damage, knockdown
cd 20s, 125 damage, fly... if you stand at dragonsreach, you should find them somewhere in the middle of whiterun

[Whirlwind sprint]
8s cd
10s cd
12s cd