I feel like removing Quark would increase the efficiency. Miles has more to fix while he's around.
My campaigns are the same, lol. It's fairly serious imo, the characters are trying to survive and get by, and have somewhat conflicting goals. i.e. one character just wants to keep a low profile and get another character to get rid of her pact, while that character wants to stay a warlock.
I mean this is a bit of humour, but it is through the characters joking with another rather than a ridiculous event.
I just started the second book in the Brimstone Angels series, Lesser Evils by Erin. M Evans. It's a fantasy book set in the D&D 5e world. I'm enjoying it, as I did the first one, if you like the D&D world and want to read a story that's like a serious campaign I'd recommend it.