Buff up engineer Mortar skill, I suggest increasing range from 1400/1500 to 1500/1800 (or even 1600/2000)
Currently this skill is absolutely useless, this change will help it fill role of long range support.
Extra thoughts:
Players expect mortar elite skill to have longer range then hand -thrown grenades.
Unmovable skill with range 1400/1500 compared to common “movable” skill with range 1500 is a total crap. It means other players can harass u and u can do nothing about it. And they can destroy your mortar in seconds.
In terms of power it still will be weak skill but long range will encourage players use it to harass enemy from safe distance, especially on WvW.
Currently all engineers use Supply Crate elite skill, we need some diversity.