Not sure, but you might have answered your own question: you are effectively saying that you *can* brush more. The fact that, as of now, doing so would hurt your consistency sounds like the good old long term development vs short term results problem. As people often point out, in TT just like in other pursuits, working on improving specific parts of one's technique can hurt one's results in the short term. If your main goal is to become a better player mid to long term, that's often a sacrifice worth making.
I don't know how you like to proceed when working on a specific shot, but for a lot of people, adjusting the speed/spin ratio is most easily done doing that one shot over and over again in drills.
Here is a more specific pointer that might (or might not) help: at least for me, looking for an answer to the question "what can I do to have better control over X" (say, X=amount of sidespin on my forehand loop) is rarely enough for me to actually achieve better control over X. While doing a shot over and over, there tends to be moments or phases when I notice an expansion in what I can consciously control to achieve that outcome more reliably. To stick with the amount of sidespin on my forehand loop: during drill, I started noticing how the angle of my wrist, together with the contact point relative to my body have a huge impact on the amount of sidespin I generate. Since I got there from the inside, during drills, I was very quickly able to adjust how I use these elements to control sidespin. However, if someone had just told me told me that wrist angle and contact point have a huge impact on sidespin on forehand loop, I wouldn't have known how to implement that lesson in play.
YMMV, but the best way to make the "I need to brush more" thought helpful in achieving a higher spin to speed ratio might just be to drill specific shots until you reach these moments of expansion in what you have conscious control over.
TLDR; here's a great example of how learning actually happens when working on technique:
https://www.youtube.com/watch?v=22F2hRS2ZiA&index=12&t=155s&list=PLRXyDmJoz1MAjeKB9hpDj8N-ORcoQtD8L
