Its among the worst things in the history of the game. Every single mechanic that requires matterspark just get in the way of enjoying the game.
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After having recently replayed Kepler on both Fabled and Mythic (solo, so I had to do everything by myself) I'd have to say that it wasnt that bad. Do I love the mechanic? Not really but it wasnt a PITA either. The only mission that stands out to me as being somewhat over the top, in terms of the mechanics, is Criticality. That mission drags on forever.