Every guest host, the show gains new viewers, sure. But they rarely stick. For a show to be successful, it needs loyal viewers tuning in because of the attraction to the system/format. Without a permanent host, there is no system and no format. Worst off, there will be no direction. It becomes nothing more than a youtube channel that posts random clips of different comedians.
If the guest host is a hit, congrats. If it’s a miss, you lose loyal viewers.
I used to be excited whenever a new daily show video pops up on my youtube feed. Now I don’t. If they continue with this guest host thing, I might even consider unsubscribing to the youtube channel.
I think it is okay if they don’t have a permanent, but they do need to make sure the guest hosts are engaging enough. I’m not sure that comedians are always the best judge of who else is funny to the masses.