What I don't like is that they have a unique item that is exclusive to a certain group of players. I think items should have multiple, equal effort/time ways to obtain them. Why make lone wolfs do group group content that they hate to get the best piece of equipment in the game.
The Borg Engines are not exclusive to any one group of players. Everyone is able to obtain them. All it takes is time, patience and teamwork.
The Borg Engines are really not all that great. I would argue that the Aegis set is far better than the Borg set overall.
If you want the Borg Gear, do what is required to get it.
There are numerous fleets out there who have these STFs on daily farm. Find one that suits you and get your gear.