Nope. Those aren't my things. I like the Mirage powertrain as is. I'm not much for altering things. If I wanted the Mirage to be something else, I would have bought something else.
A base level Honda Fit LX has a 6-speed manual transmission, 130 hp engine (without needing a turbo) & 185/60-15 tires. If those things were important to me, I would have bought a Honda Fit.
I have no desire to add a single hp to the Mirage, & I prefer narrow tires over wider tires. Thus, I will be sticking with factory size tires (as long as they remain available).
I bought a Mirage, because it was affordable at the time, seems very reliable, and it has been very economical. I value those three traits in a cheap economy car. I see very little need to change much on a Mirage. Like I have said before, I owned 3 vehicles that had less hp than a Mirage. I like the car as is.
I don't mind chatting with others about changes, however.