It'll work fine. Like I said, my main one is a 7'6". There are times when I wish I'd brought something a little longer, and times when I wish I'd brought something a little shorter.
But it'd only be a "little" nicer. You can catch fish with about anything, anywhere. Those times when "I wish" are only wishing for a marginal improvement. And no one rod can cover it all perfectly. Over time, you pick up more rods to get marginally better options for a wider variety of situations, and it gets a little ridiculous, more of a hobby than a necessity. "
Do I want the 7'2" medium-fast that shades towards fast, or the 7'4" medium fast that shades towards medium? Aww, heck, the second one is probably a hair better for this stream, but that first one is soooo pretty and I haven't fished it in a while, it's lonely.
lol.
7'9" is just fine as a base small stream rod. Stop worrying, use it, it's fine. In 10 years you'll have too many rods you don't need and they'll start getting feelings, but this one will still be very much in the rotation. And that's all you can ask for, a rod that won't lose it's usefulness.