if this is true, it would be a huge step to differentiate from other competitors such as UNI...
among other things the fees on the bcs are peanuts compared to the ETH network

It is not always easy to go beyond some other coins, even with better numbers. Let me explain it this way to make it more clear, pancakeswap moved beyond uniswap recently (now uni is back over pancake) and the market cap for uni token was always higher than pancake, even when people overwhelmingly used pancake over uniswap, the token prices didn't changed at all, I mean sure cake price went up, but it didn't go beyond uni token price just because the product was used more.
This is the same thing here, 1inch is not a bad one and with new improvements it should definitely be doing better but I do not think that it would be going beyond uni tokens market cap, it would probably just be higher in itself and that's it. I still think it is a good investment, I just think it is not going to be life changing profits here, it is just going to be reasonable increases.