With the movementspeed Update, meleeclasses now have a harder time to to dps because Rangeclass can inflict most damage before melee can reach it.
The Champion Class suffers from this the most, because of required whitehits (20 range).
Therefore I suggest to modify Disasembly Mode to additionally increase movementspeed by 50%. With the new calculation formula this results in about ~20% movement speed in most cases which is not gamebreaking and arguably still too little.
Furthermore (slightly offtopic) the main Tank of the party should have more movementspeed as well, preferably by boosting % movementspeed from Hoto/Necro Set.