How I would fix smoke in Bolt Action

This was posted to the Bolt Action Facebook:

Suggested Firing Smoke rule:

How I would modify it:

The game needs smoke to be usable, but I would make it simpler. A 1 misses. A 2-3 The smoke moves 1d6 inches away on landing. 4-6 it lands on target. At the start of next turn before rolling any artillery, make a roll for ALL existing smoke roll - On a 1-2 the smoke goes away. Otherwise it stays put for another turn.

Having to roll a direction and distance and measuring it and moving it is too much time and hassle. It's not like the smoke shell will move! Also I would set multiple launchers to be D2, not D3-1 which is not used anywhere else in the game.