That's fair, I used to play Blades of Khorne and while bloodtithe was fun for me - it offers lots of tricks - you still have the option to summon instead. Looking at Bloodtithe and other chaos summoning design, I find them to be interesting extra but they don't act as a core design in their armies, at least not like summoning is in Slaanesh.
Now that we have the option to play with these new and splendid mortals, I have been looking to build list without daemons yet summoning daemons has remained one of the key features of the army in the new book, which is fine, but Mortals are pointed with the idea that summoning would make it up for it yet it clearly doesn't.
I'm not complaining about their competitiveness, I just don't get why I am being forced to play with this specific playstyle, which is, as of right now, is not rewarding enough. I don't mind that summoning stays as long as I don't get punish if I choose to ignore it. Unfortunatly the book is built around it, at least a lot more than for another army, therefore you kinda have to work for it otherwise It feels like you are playing with a handicap.
I was watching a stream from Heywoah earlier and he made a good point regarding game design. If the rule designers struggle in balancing a rule, then perhaps they should remove it or nuance it to the point that it is not too fundamental (until they can find way to make it work, or find sth better). I understand it might upset some people but as I said, I used to play khorne and "waiting for the next book until they get it right" has become a meme for this army and I hope that it is not going to be the same for HoS.