I've been playing Dots for a while yet, and I figured I would do what I like to do. Suggest balance changes that I feel that would improve the game.

Aya -
Int Growth reduced from 1.6/lvl to 1.0/lvl.
Q 'Squall' - Being stunned now stops her movement during the dash.
R - Ult no longer gives her blink movement. She now gains 600/700/800 movement speed for 4/4.5/5 seconds. Cooldown increased from 66/44/22 to 66/55/44.

Reisen -
Reduce the bonus health she starts with to be normal with all other heroes.
W 'Illusion Rabbit' Mana cost increased from 50 to 75.
R - 'Lunatic Red Eyes' Mana cost increased from 50 to 100/150/200. Duration from 3/4/5 seconds to 4/5/6 seconds. Attack speed bonus from 100/150/200 to 150/200/250. She is no longer invisible during the spell. Illusion chance to spawn illusions reduced from 100% to 20%. Cooldown increased from 30 seconds to 75 seconds.

Iku -
Q 'Angel Raiment' Mana is drained every .1 second intervals instead of 1 second. Fixed to properly give 15/30/45/60 damage on auto attack. Movement speed changed from 0/4/7/10% to 0/15/30/45 movement speed.
W 'Thorn Sign' Mana cost is reduced from 150 mana to 120/100/80/60 mana. Cooldown reduced from 15 seconds to 15/14/13/12 seconds.
E 'Star Light' Trigger chance increased from 10/12/14/16% to 13/16/19/22%
R 'Heavens Sign' Now stuns for .1 seconds every .25 second for the duration.

Sanae -
Q 'Great Miracle' Damage reduced from 35/50/65/80 seconds to 20/40/60/80 damage.
W 'Sea Opening' Cooldown from 11 to 20/17/14/11 seconds.
R 'Divine Virtue' Now reduces damage all other allies take in the radius by 80% instead of total invincibility.

Kaguya -
Q now deals 25% less damage on target per hit on each pillar during the spell.

Cirno -
Strength decreased from 30 to 24. Strength per level decreased from 3/lvl to 2.5/lvl.
Agility decreased from 25 to 18. Agility per level decreased from 2.5/lvl to 2.3/lvl.
Base damage reduced by 10.
Base armor reduced by 2.

ITEMS

Heavens Peach - Stacks are now individually timed. Gaining a stack does not refresh the timer on all other stacks anymore.

Anchor - Stacks are now individually timed. Gaining a stack does not refresh the timer on all other stacks anymore.

Llama Doll King - Removed the active ability. Movement speed increased from 65 to 90. Attack speed increased from 25 to 40. Attributes increased from 10 to 15.

You Sure That Is Enough Amor? - Increased HP regen from 2 to 5. Increased mana regen from 50% to 100%. Attributes increased from +2 to +10.

Dust - Added. Direct port from Dota 2.

Lifesteal - Added. 900 gold for 10% lifesteal.

Devil's Milk Tooth of Chaos - Now has 30% lifesteal. Gains 100% lifesteal during the active.