If the combat starts at the short distance, is the party with higher initiative at a loss (assuming they don't have ranged weapons)? They need to spend their two actions to move closer, but can't attack afterwards. Then the second party can directly attack, taking advantage of having lower initiative. This means that starting the game at a short (or longer) distance would lead to stand-off, where neithe party would like to advance and risk getting hit right away. How do you solve this?
Does it mean that traveling with ranged weapons is critical for any band of adventurers (and humanoid enemies too)? In an open field carrying bows/spears seems critical to taking out the enemy fast and greatly reducing the value of hand weapons.