Honestly, Warlock bonds are the most blandest things ever. Why not make some bonds give our arm a fire or void effect like the ones in D1?
Better yet, just change it. If you can't come up with ideas for new intresting bonds then change it to something different. (D3 of course. you can't change it now)
https://konradwerks.tumblr.com/post/165485758857/reimagining-warlock-bonds-as-mantles-something-a
English
#destiny2
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Give all classes the bond with a custom emblem projection and just give warlocks a new class item all together.