Just a note POTD was not as well received by ppl when it was launched as it seems now.

Ppl did complain that it was too much barebone (and some still do) not to mention it had virtually no reward and was painful doing it for the weapon.
What really made him a success was that it received 2 substantial upgrades in the form or accursed hoards first and then the 51-200 floors.
Before the 3.4 patch ppl actually staying in the zone were really few even though it was a better time proposition for levelling at least on my server it was only with 3.4 and 3.45 (or it was 3.41?) when it really bloom

Which means that Eureka will be success or a flop based exclusively on the devs support of it

Personally I think that real Potd exist from 51 onward 1-50 was just an appetaizer of what would come nothing more