I think the vultures are pretty cool. I love how they don't attack you until you're injured. I think it would be better to restrict them to certain biomes though. Feels weird seeing vultures in the snow for example. I could seriously do away with rabbits, pigs and wolves though. We need one sort of animal like the deer for a food source.
I agree not enough zombies all round though.
To the OP, I agree. The horde seems to come a few zombies at a time, and then you have to wait for the next batch to come along. Not terribly nail bighting. Back in A13, the hordes were so scary, afterwards, we were rocking back and forth in the foetal position. lol