We have improvements coming for systems like yours in the next patch. Personally I saw my i9 framerate go from about 220 to 280 (and others with better OC characteristics were getting above 300, YMMV).
I wouldn't say that Fortnite is necessarily a more demanding game, Valorant's networking and movement model is very demanding (in part due to the high number of updates per second the server sends).
It would be a nice long term goal to increase the usage of additional cores but going from 2 or 3 cores heavily utilized to an arbitrary number isn't as simple as a configuration change. Concurrency issues are some of the trickiest problems in all of programming and so work needs to be spread across cores very carefully to prevent subtle bugs from appearing.
On the other hand we think there's still a bunch more performance improvements that we can get into the game and we're hoping to deliver some this patch but we are also hoping to continue to improve in the futu...
Read more