More like a chillaxing horde now a days. I'm not sure Ive seen anyone complain that a group of 10 straggling zombies is an issue outside of day 1 except builder types who run in circles when they see a zombie in the first place
Actually been seeing a lot more talk about how FEW zombies there are in the recent updates. If XP is the issue with having more, then a further nerf to the XP would do the trick, rather than reducing the population to 5 or so. Remember we are focusing on fun this Alpha, and what's more fun than cracking a few dead skulls.