Have you considered just going for the tarp Hex rather than the tent? Personally, I would not want to own a shelter with a net floor for several reasons. I own a Hex solo tarp and it is one of my all time favorite piece of gear. I have used in heavy rain on several occasions, and always been completely dry. I use a garbage bag cut in half as a ground cover often, or a double MYOG ground cover that is a garbage bag with a space blanket taped on top of it, and these do a great job of keeping me dry from the ground as well as protect my bivy and/or sleeping mat.
I have been backpacking and camping for over a decade and a half, and have never been in a situation where a flood of water came into my shelter and pooled around me. Maybe I have been very lucky, or good at picking locations to make camp for the night, or both. I think the whole flood of water into your shelter area, enough to cause big puddles, is both rare and largely preventable.
Anyhow, with a tarp you can still get bug and/or wind protection with a bivy. If bivies are not for you (there seems to be a big love em or hate em trend), you can get a bug shelter to put under a tarp, or just a bug screen or head net to take care of the bug issue, depending how much of an issue it is for you and where you camp.
If you feel that flooding will inevitably be an issue for you, I dunno, maybe you are going to be backpacking in a rainforest or something--perhaps it is best to just take the weight penalty of a tent with a solid, built-in, bathtub floor, of which there are many options.
Report back on what you ultimately decide on and let us know how things go! :)