I've been doing some DB review in my game and one of the leaks found was my too tight CC range from MP, CO, BU, SB.

From the last ~50k hands, my general CC range is 9%, it doesn't look badly just for the 9%, but when we look for positional CC range, I've found some problems.

I've been reading the Applications of NLHE from Matthew Janda, in some examples he gives 8~12% cc range (except for SB) vs an EP open.
My cc range vs EP in general is something like 2~4%.
At this scenario, he also recommends to add some speculative hands that I don't use as call such as KJs, QJs, JTs, T9s, 98s, 87s, plus the std QQ, AKo, AQs, KQs,etc( 8,5%ccMP flat vs UTG). Obviously he is not suggesting that we should call with this exactly hands, but he is passing the idea of an ~8,5% cc range that I don't use. I feel more comfortable to 3b some of these speculative hands in a lower frequency. That's why I'm afraid of getting squeezed or play a dominated hand vs EP.

I wanna know from you guys, in a standard way, is it okay to cc with those speculative hands I said above in a MPvEP situation, for example?
Obv, sometimes will depend on the left to act Villains as well, but I'm saying in a standard way, no fishes, no maniacs.