We are really waiting for this, the best swap in my opinion right now is from Binance, unfortunately not DEX, I'm sure if this happens then other DEX will follow or die. and the other side, of course, is the low cost, not like Uniswap, which needs hundreds of dollars to swap.
Until now there is nothing new that can be tricked to minimize the cost of Gas transactions on the Ethereum network, and if it can be very helpful and can function like a DEX, then it is clear as you said that other DEXs will be very quiet from users.