We need to be given the option to enter Hamlet at a lower rating

[Antanias]

Actually it never required any rank. I got the no dol/doh achievment many many moons ago when hamlet was still a pretty new thing. It was a level 1

They were, in fact, rank 5 when Hamlet was introduced. I dunno if it was a ninja-edit on SE's part around 1.23, but now those achievements no longer require a particular rank.