As weird as it may sound, this change has made the addon much, much better in my opinion.
The confirmation takes really no time whatsoever, which is the only possible drawback.
Compared to before, however, I now have notably less people joining that are 2000+ yards away, it appears to now prevent the unintentional switching to raid-groups and it generally appears to go faster than before. Prior to the change, the addon would occasionally find 4 groups, not give me any invites, then try again, and again, and again, then create a new group 30-40 seconds later. That appears to be a thing of the past aswell.
Overall, really satisfied with this change... and didn't expect it at all.