At first I was upset, but now I guess it's okay. I'm more upset that we didn't get a Coward trait alongside it, I had some sims I was planning to make cowards! :D I use a mod that allows multiple traits and it honestly works fine, they don't flip through emotions or anything (I also use Meaningful Stories, so that probably balances it out lol).
My issue with Reward Store traits as a whole is that some of them do things that should be included in the regular traits. I feel like Speed Reader should just be a part of Bookworm and not its own separate thing. Leave Reward Traits to stuff like slowing down motives.
