Zeal no longer gives Movement Speed, but the in-combat Movement Speed of Cloud Drake has been slightly buffed and changed from % to a flat value because that's better for the low MS Marksmen.
Zeal has slightly more Attack Speed, but its upgrades have slightly less. Cloud Drake also gives a tiny bit of Attack Speed.
Life Steal no longer increases with critical strikes bonus damage, but is slightly higher on finished items (stronger mid game, weaker late).
Now Marksmen need to prioritize getting Cloud Drakes for mobility and Ocean Drakes and Red Buff for sustain.