Adjusting a Map for Very Little Units

I have a very large map, but I didn't have enough space so I made units smaller there and all buildings will be units with no pathing, pathing texture and ground shadow.

And I've also got 6 problems:
1) Camera scrolls too fast for that distance of the camera I have set for my map;
2) When ordering multiple units of the same Unit-Type to move somewhere, the distance between them is too far;
3) When issuing an order such as Patrol, Move or Attack Ground, the green arrows appearing at the position of issued order are too big;
4) Rally-Point model is too big;
5) Units of the same Unit-Type stand too far from each other when attacking each other;
6) Units, such as Demolisher (Footman, Knight, Rifleman and everybody), leave "footprints" (spawned effects), that are too big for the map;

Question: how to get rid of those problems?

If no way for that, the map will look awful.

You can scale units down, but things like distance from each other, rally points, the green arrows, footprints and even some sfx like fires or explosions, retain their normal size. The same goes when a unit is scaled up.

TIP: Use normal size,pathing, shadows and properties of units, and have a bigger map 256x256 or get WE unlimited at Wc3campaigns, it allows you to have bigger mapsize (for now the site is offline).

The 6 problems are a common problem with many mappers when u scale units down tooo small, and theres no way to get rid of those stuff.

Is there Minimum attack range variable at GamePlay Constants?