You don't need to install all that stuff. If issues arise, then you can consider installing those things.
I agree, coil whine isn't indicative of any sort of hardware failure, it's just an annoyance. You can try to RMA/return, but there's not a guarantee the new one won't have the same issue. I wouldn't blame you for trying, though. If you can still return it in store or use their protection plan, I'd go that route, as RMA's usually require you to pay the return shipping at a minimum and then you also are out a GPU for 1-3 weeks depending on turn around time.
I haven't noticed mouse acceleration issues with Gsync. However, try this: Press Windows Key + S and type in "Mouse" in the search bar. Open the Mouse Settings. Click "Additional mouse options" in the top-right. Go to the "Pointer Options" tab. Is "Enhance Pointer Precision" checked? If so, uncheck it, then see if the sensitive issue is resolved while gaming. I always disable the EPP setting as I find it's a bit annoying in-game.
Thank Mr/Ms. Bubbly, you're a good and helpful OP.
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