If you add a significant amount of power at the MAP, it will cause the airplane to climb a bit. Remember the servos are holding altitude so when you add a bunch of power, it takes some time for the servos to compensate for the increase in power and keep the aircraft level. It also depends how much power you are adding. If you are at 18" in a stabilized approach and bring it up to 20" at the MAP, it shouldn't do much. If you are at 12" in the approach and bring it up to 20", it will probably pitch a bit before it stabilizes.

We did debate the minimum altitude scale and determined that 50ft intervals were the most convenient and prudent option. 25ft increments caused it to take too long to run up and down, 100ft increments were too large. Realistically, most of our customers don't fly in IFR conditions where 20ft means landing or going missed.