I got a 2nd replacement guitar, but it's still iffy. The overdrive seems to fire itself off sometimes, but the strum bar is quieter than the first replacement. I sure hope they make the wireless one a "deluxe" version, as I would pay more for a wireless Strat that worked well and kept working. Heck, I'd pay extra for wired one that kept working well as I like the guitar.
I'm back to using the guitar pick, which I find really helps me keep time alt-strumming the long sections.