Unfortunately not, no. The sacrificial altar is actually largely form-follows-function. It just gives the antennas a bit of distance from each other and from the metal in the router, to reduce any interference or blockage.
And the more open design allows air to circulate better, which I don't know, if this is a hard fact, but I feel like many cheap routers are as unreliable, because their hardware becomes faulty at higher temperatures.

Ultimately, though, it's also kind of accidental. You could build a relatively decent router in such a white box design, and for example in many companies, you'll see wall- or ceiling-mounted white box routers which actually contain good/reliable hardware.

But most of these white boxes, especially when they're not intended for mounting, are just cheap garbage handed out by ISPs. The sacrificial altar is something you buy intentionally, so it's generally at least not cheap garbage.