You're right. While the vanilla game has gaps too, multiplying everything by the same value makes those gaps get annoyingly large very quickly.
In addition to that, while looking at my code, I embarrassingly realized my tile-rounding logic is flawed, which actually makes the gap issue even worse.
I will soon update the mod with the rounding error fixed and a new Maximum gap option. You can set this to 0 (or 0.5 to allow for some diagonal leeway) to make "click and drag" place poles perfectly without gaps.
The Maximum gap will default to 2.5, which is the same amount of gap that the vanilla Small electric poles have.
The limit will only apply to poles with relatively large supply areas compared to their wire distance; this avoids applying the limit to Big electric poles or similar long-range, small-area poles added by mods.