FoodPorn

I dunno, I went looking for recipes to see what the process would be to keep the tortilla from falling apart as the beef released fats during baking and the sauce seeps in.

The gestalt is that you just minimize the fat in the first place, and have a layer of something that will shield the tortilla. Namely, cheese.

Brown low fat beef/meat/meat substitute. Warm the tortillas in a pan, and melt a layer of cheese on the tortilla.

From there it's just assembly and a long enough bake to melt the cheese that's on top.

Hypothetically, the tortillas should stay intact. Makes sense; other bread and bread-like things can take heavy sauces when there's a layer of cheese between.

As far as whether or not they'd taste good, well, taste is relative. I'm dubious of that much ground beef actually tasting pizza-ish enough to satisfy that desire. I'm okay with ground beef on pizza, though it isn't my fave. It's the ratio in the image that makes me dubious it'll hit the pizza urge.

I've been around long enough and done enough experimental cooking that I can usually "taste" a recipe without actually eating it as long as the ingredients are familiar enough. Nothing in the image, or the recipes I saw, would be bad at all, though some of the recipes really don't get what pizza sauce is. A lot of them are just dumping "Italian" herbs into the beef for some reason, like that's what makes a pizza a pizza. That does make a decent meat sauce for pasta in a pinch, but it isn't pizza flavor.

As a comparison, pizza dogs exist too. Cook hot dogs your preferred way. Place the buns in a baking dish. Place dogs in buns. Top with pizza sauce of choice. Top with shredded mozzarella. Bake until the cheese melts and is lightly browned. No pepperoni, no extras as the core, but it actually hits like pizza in terms of flavor. You wouldn't think so because of the hot dogs, but the sauce is the dominant flavor, followed by the cheese. Which is more pizza like than the pizza tacos in the image. Sorta like a meatball sub more than actual pizza though.

All of that rambling being said, I think it would taste at least okay to most palates. There's nothing that would clash, and nothing that would dominate so much as to be offputting. I'd actually agree that some extra seasoning in the beef would go a long way, but I'd focus on some garlic, maybe a little oregano, rather than a premix, or multiple herbs. Just something to lift the beefiness into a less burger-y taste.