First I don't believe Perkins was trying to follow RAW in the wyvern encounter. My guess is he did that for entertainment value and nothing wrong with that.
I just don't see the logic of allowing the PCs to be surprised when they can clearly see the threat of the bandits in the open. That interpretation makes no sense to me. Basically this allows a single surpriser to lock down the enemy for an entire round while the surpriser's allies get a free round.
So if the PCs are walking down the road and see a group of ogres charging them then a single hidden goblin could lock the PCs down in the first round. That makes no sense at all.
I just don't see the logic of allowing the PCs to be surprised when they can clearly see the threat of the bandits in the open. That interpretation makes no sense to me. Basically this allows a single surpriser to lock down the enemy for an entire round while the surpriser's allies get a free round.
So if the PCs are walking down the road and see a group of ogres charging them then a single hidden goblin could lock the PCs down in the first round. That makes no sense at all.