Oh, you're absolutely right. I just looked at who the publisher was and forgot Disney was even involved.

1) You miss out on Doom 64's awesome teleport effect. 2) Spawned enemies have a brief window while fading in where your shots will pass right through them, which feels unfair. 3) You can end up with what's pictured above: so much spawn point clutter that you can't even make sense of your own map.

(Dummy sectors not shown, obviously, but the point is the readability of the main area.)

Doom 64 adds the ability to just spawn monsters out of thin air without the headache of dummy sector setups like in Doom. It's great if you want to map really fast, but...