So, in the first place, it's about the goon Lil' Big. I actually find him not annoying at all unlike Beatrix Devon & Flip. To me he's more just like a regular customer. I mean, you can easily control where he will sit down by not collecting coins paid by previous customers.
Now, here is my suggection: he can teleport to a seat without being the first of the queue. In that way, you will definately need to be more cautious with collecting payments when he is around. In fact, it is like adding the cutting-in-line feature of Beatrix to him
Secondly, it's about the information about your customers. I think that can be a little bit more explicit, like making a chart about their speed, their patience and their appetite. In addition, you can make another chart about who they will come with and what service or food they will request in each venue. Sometimes it may get kind of hard to remember for new gamers.
Last but not least, it's about the limited timeline stories. It is kind of sad that new gamers may not be able to enjoy previous events, so I think you can create sometime like a list of previous events they can choose to play from once they have finished the quests of the newest events from the latest updates.
So, that's all. Hope they can help you~