So far Uniswap has received appreciation from Eth erc20 users,to exchange directly through their wallets, but over time many dapp companies that will compete with uniswap including moonDefi are building communities and attracting some users to try the live exchangevia dapp.
Moondefi is not yet even traded on the uniswap and it's too early to say that moondefi has become a competitor for uniswap. Sushi swap is the real competitor for uniswap but it has been leaving by its users due to the some reasons.
It looks like uniswap is still holding ethereum as its basis. Uniswap is dominating the ethereum chain right now. It's very difficult for a new defi to replace it.
The only potential defi to compete with uniswap just like YFI or compound even both were not swap service.