I don't really feel the jump so important. Someone wrote "jump is for new MMO". I find Jump already old.

If you can add some real use of jump:
(example)
When jumping I can damage more with a certain skill, or attack some particular part of a monster.
But if the only things jump adds is some form of suicide, or to climb over a fence, I can live without.
Yes, it can add a dimension in some quest or some fight, but this is possible with some tool (use an item) or a contextual jump, as already said.