The "research" was commissioned by a supplements manufacturer, so it's far from unbiased, and the claims are very vague. Quercetin is used for a few things, allergies for instance. I've never heard that it provides energy, and it certainly didn't when I was on it. There aren't any magic pills for weight loss, I'm afraid. I doubt the amount of the herbal extracts is significant either.
As for electrolyte drinks, personally I think they're nifty things. They make a nice pick-me-up and can be good when you're craving something sweet. This one has a little sugar in it, which you may or may not want, and ditto on the caffeine. I use Nuun tablets, which have sweetener but don't seem to taste bitter or cause any bad reactions, neither to me (and I am ill and sensitive to such things) nor to anyone I know. It's a popular brand and has a good range of flavours. Most of them are caffeine free, but the cola and the green tea flavours have some caffeine, about half the amount of a cup of tea.
So electrolyte drinks are worth playing with, and you can have fun seeing which you like best of the different brands available. I doubt this one has any significant benefits over the others, they are just using the herbs as buzzwods, but if you like it, go for it!