The biggest advantage is certainly that buyers don't have to wait for a certain time to submit orders, but that they can submit orders at any time. This makes the system much more convenient for users. Dutch auctions have a very high activity right before the auction is closing. If pieces of the infrastructure are not working reliably during this time period, then prices can fall further than expected, causing a loss for the auctioneer. Also, high gas prices during this short time period can be a hindering factor for buyers to quickly join the auction. Dutch auctions calculate their price based on the block time. This pricing is hard to predict for all participants, as the mining is a stochastic process Additionally, the unpredictability for the mining time of the next block Dutch auctions are causing a gas price bidding war to close the auction. In contrast, in a batch auction, different buyers will bid against other bidders in the mem-pool. Especially, once EIP-1559 is implemented and the mining of a transaction is guaranteed for the next block, then bidders have to compete on bidding limit-prices instead of the gas-prices to get included into the auction.