This upcoming project sounds interesting, could solve a lot of issues around high gas fees in the short term and liquidity being segregated between DEXs in the medium to longer term.
Could be worth a read:
https://raydium.medium.com/the-raydium-protocol-9809464e0105
I do wonder if shared access to single underlying liquidity pools on top of low fees could make this one to watch, even if / when ETH solves gas issues.