No i believei know exactly why there is a goat, instead of horse, pulling this cart...
They, the devs, might not see it as a huge issue... NOT TO THE EXTENT that it would require a huge investiment in some project to prevent it.
What the Top 1 of PVP gets by the end of the week is hardly a big deal to be so covetted anyway. Yes, it would be nice to be among the Top 10 for bragging rights and such. But the real, sort of tangible, in-game rewards are some traitstones that anyone can farm quite easily in Explore Mode, the gems and other stuff can also be farmed in some more laborious ways like Treasure Maps...
As i said many times PVP is a joke, yeah so much for a fanboy that really despises a game mode, but it sorts of work like a weekly "in-game job" to keep people occupied and help them making some progress. So it's not a total failure, except for the competitive aspect that is tainted by people sharing accounts and other issues and details, and the developers might have recognized that it's not working as it should because of those limitations and simply increasing the rewards coverage until a point where it's humanly possible to play until you and others get what is deserved... No, this would just overload the game with more premium currency and more problems would breed.
Then Sirrian sat on his throne thinking about the next competitive mode they should create:
So he, and the rest of the team probably had a lot of meetings to figure out a lot of restrictions to prevent any more exploits like people playing on more than one account.
The five daily limit could as well be one the measures alongside the total mumber of battles, maybe not a solid idea to start with but for a group of people that...
They come around and listened to the feedback and changed it. I was against the change even knowing that it could bit me in the rear at some point, but i understood that they designed it in this fashion to guarantee an average gameplay on each day of the week with rewards attached on each day.
Do you even remember that people asked for extra attacks in order to cover up any missing guildmate that might need to take care of IRL issues? But if they did followed this suggestion it would open a breach for people to play "for others", something that they might been trying to avoid in the first place.
Yeah, i'm throwing assumptions of why things are some way or another, and why the devs decided for it in the first place. I can't pretend to know the answers, such as "Because they don't care!"
Sometimes they can't/won't assume certain things in public because they are, in the end, icons of their company. Their presence, good humor and playfull jokes with us here are but a courtesy, a very nice one that i'm sure you also enjoyed over and over again.
So feel free to call me a fanboy as much as you want when i respond to any (as i judge) ill-tempered posts saying that the devs don't care or when i think they are being unfairly treated just because you feel entitled to coerce them for an statement that they can't solve a problem. What good would it do? Honestly, just answer me that! How will it help them overcome the problem?
Admitting it won't work out except to satiate your ego and undermine, a little, their image.
So much for a fan of Sirrian's work... It's a good thing that i'm not one in this twisted sense...