I think I'll take one point by one others to keep the focus steady. So, I'll took my first point and pick up the four others later once the first one cleared up.

Were you referring to gas fee? Because DEX's fee --as I previously said-- is very small. Uniswap and sushi took 0.3% while PCS is 0.25%. Now if you're talking about the gas fee, there's literally nothing a dex platform can do, as this rate is determined by the miners, which again, kinda solved by the emergence of low fee chains like BSC and polygon. With those said, it means the only factor a dex can manipulate is their fee itself, so the question would be: on what rate will your DEX be that you're confident enough you'll appeal traders to use your platform because you "solve" this high fee problem?