in all honesty i dont think the nerf was massively needed, terran needs APM to spam snipes, and with APM used on infestor/broodlord they could beat ghosts,
so even without an overseer, ghosts have to use cloak to start with to get in range of BL which removes 25 energy already, i dunno its too early to put together a good post need MOAR SLEEPS
dude... snipe range =/= ghost attack range...
Also, whilst it does need 'high apm' to spam snipe, i wouldn't considering holding shift and spamming click on one spot, then then the next spot, 5 times over with plenty of time to change between targets without it being inefficient an even remotely mechanically demanding task compared to things like marine splitting, FF+Storm combos, ling+bling+muta flanks, etc.
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