From what I've seen in the Omegas, nomads and wilde primarily target defenseless transports until the police/military finally get around to engaging them.
You suggest significantly upping the alien presence? It would crush traders who try to operate during the day.
Obvious solution: Traders should hire escorts.
But, escorts are scarce. In order for there to be more escorts, there has to be something (money) in it for them to rival trading themselves.
But unless you're hauling ore, that's splitting the profit rather thin. A cargo hold of engine components, on a 15 min trip between berlin and london, in a 5k trans gets you $2k profit x 5k = 10 mil. Not bad if you're solo, but not really worth your time if you have to split it with your escort.
But if you increase the profit margin to compensate for the need to pay your escorts during the day, traders who operate during the night when most people are sleeping get to hoard all of that extra profit to themselves. Also undesirable.
If a system could be implemented where prices would automatically adjust across Sirius based on time of day or server population, so that you could make enough to split with your escort and still make it worthwhile for both of you, then maybe this could work out. Otherwise I foresee traders getting kicked in the jibblies all the time and withdrawing their moneymaking activities to the wee hours of the morning.