I still think more low threat heroes is a good thing, as long as they are not Glorfindels, but have the right stats and modest abilities for their threat cost. This is not overpowered, but simply gives more deck building options, not just for Secrecy, but in general.
Yes I also think Glorifindel is really bad design hero.To much powerful and very stupid way. But for solo and for secrecy he is good. Wny he didn have a text : Setup: if you control 2 more heroes other then Him remove Glorifindel from play.
So as a pure Secrecy hero he can be ok.
Because he is not that powerful to have such ridiculous text.