This get's the jumbo sized embed for this particular megathread! hehe
I was happy that Aoife and Wolfheart chose a Mod called "Adjustable Party Limit" to showcase as the first up on the Channel from Hell. I think it demonstrates reasonably well how having a larger party works/looks/feels here, without busting the game.
The mod also addresses some of the issues like the Boat transition in Act I and Long rest antics, which caused headaches with some others, like where the player would have to know in advance or meta-avoid those transitions while using a party of more than 4. There was mention of a difficulty mod to pair with the increased party limits, which right now are handled via a spell-like toggle. I haven't tried it with a multi-class Sorcerer yet, but seems like a pretty good solution to me. Hopefully more like this! My search results for a "Scratch" mod showed no results, sadly, but it's good to see Shovel up in the mix!