I really hate the idea that the events of First Contact happened because of a time loop and prefer to think that the Borg simply changed the timeline and themselves because of that. It's the easiest way to explain the differences in their appearance and behavior since then.
By the way, we only have Seven's word for it. Could be that Annika never was Seven of Nine before the Borg manipulated the past and Seven as well as the entire Borg Collective are unable to see what really happened and just interpreted it as a loop but actually it wasn't...
By the way, we only have Seven's word for it. Could be that Annika never was Seven of Nine before the Borg manipulated the past and Seven as well as the entire Borg Collective are unable to see what really happened and just interpreted it as a loop but actually it wasn't...