The point is that in the last Q/A Kaer answered about armory incoming in some weeks, personally idc about armory (if bugged as the previous molten one), but as there will be a tournament and so on, i guess we should have the possiiblity to know who are the top teams and their rating because otherwise will be a problem in the arena activity.
At least having a working ladder updated daily could help players to know who is the highest rated on each ream atm (and for the guy above, it's not me XD) .
Not having a ladder witch you can figure out who plays legit (or try to figure out) will lead in a risk season, as you dont know against who a certain team is playng and so on, allowing probably the "wintrade" and "mmr droppers" to do it without anykind of problems.
Bumping for a staff answer :)
Regards