Why should a caster be able to beat a melee in melee range? What you are asking for makes no sense. Why should a caster be able to infinitely kite everyone to death? Casters in most pvp games are OP. We have gotten so used to it that its normal.

What BLMs need is the ability to escape, or CC to slow melees down. If you lose range it *should* be your loss. Thats called balance.