I live off Gessner about halfway between Long Point and Hammerly. Been here for almost 7 years now. I think the area you described is kind of one in the same. It all depends on the house and block you like the best. There's not really a better area overall from what I know.
I like being closer to 10 as you save a few minutes to 10. Plus, there's a little more development closer to 10.
As for Witte it's been open for about a month now I think. My assumption is it all ties to drainage which is why they're re-doing Gessner right now. They're putting in drainage so that area will quit flooding when there's more than 3" of rain.
EDIT - I've never flooded through the Memorial Day, Tax Day, and Harvey. I think those areas you described were all okay too but I'm not certain.