in master, under level lost sector it's unable to or barely able to stun a barrier champion.
it needs a buff againts barrier champions and gameplay without champions.
the buff should be:
similar to arbalest the barrier champ should be 1 pop with the exotic and stunning a barrier champion (maybe also when a teammate stuns) refunds 1 or 2 melee charges.
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for neutral gameplay hitting enemies with melee throw should refund some melee energy (10%) on each hit or maybe whisper of shards level of melee regen when you have an overshield.
let us build into the shield throw fantasy.
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Tbh the biggest issue is that the shield toss at a base level is utter garbage and the exotic changes nothing about that. You just have two charges instead of one. In theory the exotic could be cool, but two charges of a shitty garbage melee is awful.