IIRC It was designed to be used by exchanges and the like, and for that it seems to be a great solution. As a normal user I prefer to peg-in and out of lightning.
Discussion
With liquid you forget the pain in the ass of channel management.
Liquid works just like Bitcoin except that blocks are generated every minute and transactions are private because they are encrypted.
It is true that liquid is federated, but it is the same path that fedi or fedimint have followed and I think it is a good way to scale.