While it was proposed to ban 5kers/barges from group jumping it's still here. But when this ability will finally gone, maybe we'll be able to rebalance group jumping to be used as offencive weapon.
Imagine following situation: huge fleet battle, Gallics vs. Liberty, for example. Liberty is loosing. In desperate attempt to save situation brave commander of carrier LNS-Victorious decides to charge into enemy fleet. Gallics thought it's fool move, but captain of Victorious have charged jumpdrive onboard! So when his bleeding ship reaches gallic lines, half of Royal fleet simply disappears! And appears somewhere else.
Ye, I know it's crazy and will be abused for sure.
Edited: well, it can be done right now. So group jumping cloak mk6, which requres less fuels/cargospace, have bigger range(300m maybe), but will only jump into random locations