Incinerate skill gem - multiple issues

Video Performance:
1. Looks absolutely incredible. However may need optimisation (I think this applies to all fire effects actually). My video card heats up and I hear the fans spin harder when I start channelling it. Incineration IRL.

Usability:
1. The flame could come out slightly faster (reach it's maximum range quicker).

Controls:
1. Moving with mouse controls (Mouse 1) stops/starts the ignite being channelled (holding Mouse 2 or key). That's annoying and a damage drop.

Seems that WASD or controller would be the only inputs that allow incinerate on the move.

2. The turning circle could be slightly faster. It's already awkward to use with aiming, channelling and moving at the same time.

Description:

3. The skill gem description "Ignites as though dealing x to y Fire damage" makes it sound that it's not multiple hits in a row. However the Sustained tag says it is. Maybe the description could be slightly clearer on the behaviour so it's more obvious on how to scale the damage.

In response to "2. The turning circle could be slightly faster. It's already awkward to use with aiming, channelling and moving at the same time."
It seems that movement speed affects the rotation speed while channeling. It's not a lot but 15% MS boots on did make a slight turn speed difference.

An issue I have with the skill is the burning ground at max stage only burning at the final length of the spell.
I don't need that ground on fire I need the ground on fire in front of me where the mobs are stealing my lunch money. Actually, just set the ground on fire the entire length of the spell. That ground, this ground, all the ground on fire.

WASD and Controller can hold a channel while moving but mouse keyboard cant