It really depends. If you don’t have many of non-S1 4* it’s better to pull elsewhere (S3 for Gullinbursti + Mist, S2 for Proteus + Wilbur etc.) If you’ll be happy with any 5* then there is not much difference. However if you aim for any non-S1 5* then it’s rather good spot, as a chance of 3.3% of non-S1 5* per pull is the best among the portals.
Also, the heroes there being outdated is not completely true. For one, current HotMs are par on with power creep, and May HotM seems rather good. Second, heroes such as Hel, Seshat or Alberich are still beasts even with slightly lower stats. Yeah, heroes such as Perseus or Thoth are not great, but they were not that great to begin with, so…