Question
 

In blood in a multi game, the enemy will be still red signed like in Death (when your colour is blue and the allied violet)?

We make a match 3vs3 this night and the players found difficult understand if they are fighting against two players units, if they are doubled, etc.

I think give colour differents for enemy as options, can help the beginners matchs.

Never faced such problem. In game it is important to know only where an enemy unit and where mine, and HUD system it allows to make.
That I would change the only thing, it that colour of my groups was green, and friendly - blue. Violet colour very badly we see on a mini-map, especially on snow.

I agree, me too i have not problem, but many beginners ex MTW will find difficult the first times.