A cheaper price bundled with a pro controller would instantly make the Switch much more appealing to me. The portability means nothing to me, it just makes it more expensive and awkward.
As it stands, I'm not going to pay that much just for Zelda and the handful of other exclusives I'd play on the system, as it would be my last choice for multi-plats.
I think a much cheaper SKU would increase sales as a "second console" for the Switch that won't be there at its current price point.
At its current price point it's selling exceptionally well, though. Why reduce the price tag to secure a "second console" market when it's succeeding at $300 as a "first console"?