I find it it's more satisfying to smack them with a bottle. It seems more realistic lol.
"Nothing beats the hobo life, stabbin folks with my hobo"
Another thing you could do to make it interesting is put a permanent horde on while it's expert difficulty C.O.
Make the max zombie count 200-400, delete the bots.. Continue to use only a medkit. Etc.
The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts.