Your analysis is welcome. Two points:
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In your suggestions, you should also consider dimensions other than damage per second. Time-to-overheat, spread, maximum range, auto-lock are all factors that have been take into account in the original design. A straight damage comparison can be misleading.
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It’s impossible to balance all weapons both under human and tool-assisted conditions. You must pick one or the other. A while ago there was an issue how fast the Riddler can humanly fire (Little question - #20 by InterAction_studios).