Exploring the map to study the territory and keep control over as most area as possible is one of the main feature of an RTS. This patch makes this feature more adventurous by reducing units max attack range and vision range in respect of the conversion from tiles to meters by multiply vision ranges by 4 implemented in r7816.
The vision range hierarchy is: support < citizen soldier < melee siege < champion < hero < structure < ranged siege
Now "phasing up" grants vision range to citizen soldiers.
Also technologies have been adapted and now their ranges are multiple of 4.