These ideas are all pretty horrible... it's your typical "we need to replace the entire system" bullshit that always fails to look at more than one aspect.

The big upside of modern sewers is that nobody has to shovel human waste. You don't just drop it into a hole like with a vacuum toilet, zero water toilet or a modern outhouse, you transport it to a modern facility for treatment without anyone touching it.

The number of diseases that spread through your poop is very high. Having people move around and pick up your pile of poop(and hay), to use as fertilizer is just a begging for an outbreak.

Granted, using potable water to transport feces is dumb as shit, pun intended, but that's an entirely different problem to solve.

Source: am safety lady, work with hazardous materials (indirectly, I only very rarely actually handle human waste)