The zombies spawn in very slow and the time between rounds is quite long at first. Giving the players more points wouldn't do much good, it would result in opening more doors and the zombies getting lost. I don't really mind the slow start though. I play one or two games a week or so. Therefore I'm not in a hurry and I like the ambient sounds and the extra things to see or do.
Besides, the in-between rounds moment is a good time to do certain things.
For example, you do all the beast mode things at spawn, pick up the key and the other thing. Knife the last zombie on your ways to Nero's place and while the round skips from one to two, you can do the ritual. Drop down in the junction and the zombie are just in time to get butchered.
In later rounds, these seconds are valuable to get a perk or pap something.