Harmony - Troop Symmetry

Here's the thing – you can't just arbitrarily reduce movement speeds. As I mentioned before, if we reduce movement speeds, archers and sorcerers (both sorcerer units and sorcerer heroes) will clearly have an advantage. However, this will also affect, for example, Wingard. The essence of his special ability is to move his troops forward on the battlefield so that they can act earlier, but during the battle, his special ability no longer works, and the whole point was that, having high-speed units, they could cover the entire field in one turn and attack on the first turn, and in this case, the ability to go first was crucial. But now, with reduced movement speeds, no one will be able to reach the other side in one turn, and going first is no longer as important as it used to be, which means Wingard's special ability has become less effective, and therefore he has become weaker.
First: how far will the decision to reduce movement speeds go?
Second: is it worth strengthening Wingard's special ability, and if so, how?