So, in other words, this type Exclusives move is only for until Epic gets a foothold (hopefully), but could continue on for a while, depending on how well they do...

Pretty much.

Whether it would be successful or not is another matter. From what I’ve seen, looks like a lot of people are hesitant on using it, particularly due to the lack of features in comparison to Steam plus GoG

In that case, would it speed up the time tables if Epic's game launcher reached statistical usage parity with Steam before the end of 2020? Would Epic actually stop using console-like exclusive practices if they do so? Or would giving them the benefit (of the doubt) actually cause for them to clamp down on said unwanted activities (positive reinforcement - psychology)? I'm kinda wondering what the intended purpose and motive(s) for the exclusives are now, seeing that those two factors will determine whether this type of action will persist in the long-term...