Accurate but I wouldn't say "ranged never gets the spot", from what it looks the DF will stay waiting for a melee for a while before filling the second slot with another ranged, but that wait time is not that long, same when the DF matches two melee together.

But the main problem here is melee and ranged queues being separated and it being 2 melees vs 3 ranged, even if each class had the same amount of people playing them it already means melee will have an easier time.

Things will even out (or will turn worse for melee) when rogue is out.