Seriously?
Every other class gets a pretty effective evasion tool with this jump yet...not the Titan.
Not to mention if used effectively its a great tool for attacking an opponent. Ive had plenty of Warlocks and Hunters evade my shots and appear inches from me to use a shotgun blast or a melee to one shot me.
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TANKS AREN'T SUPPOSED TO TELEPORT. THAT WOULD BE RPG HERESY. But really why is this a question? Only 2 out of 6 subclasses get it. It's supposed to be kind of special, and other double jumps have greater range which helps get to high places.