Considering the stuff they are doing is effectively a passion project being run off donations it is pretty understandable that things take time.
I wouldn't worry about it. Keep enjoying the game and doing your thing.
One of those things I always wish they had access to. Just seems like it would fit with scrappers really well.
Same goes for energy. Unless I'm missing something on that one. Believe it has been available for all melee except scrappers for some crazy reason. Goes straight from tanks to stalkers. Such an unusual gap imo.