Nova is my favorite stock-like launcher but my favorite is Lightning Launcher Xtreme. But if you want toggles in the notification bar, you should definitely give Power Toggles a try, and if that's not right for you consider rooting and getting a custom ROM that allows the feature within the...
If compatible, give the official Samsung apps a try, and if they fail or aren't compatible, get yourself a dongle, possibly Chromecast, and see if that gets the job done
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Something set up badly for WiFi in the ROM is constant polling, even when it's turned off. To fix, go settings, WiFi, menu button, advanced, then unchecked 'always allow scanning' saves a stupid amount of battery.
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