As of right now, pure DPS is all that matters. With the current system, debuffs as well as tactics such as positioning, stunning to prevent WS's from going off, kiting, anything in general really are made completely useless. That not only makes combat feel dull, but also harms the creativity and viability of interesting class types. Classes like Green Mage would completely flounder. Longer, more varied battles would alleviate those issues.