What are the list of things that were in classic but not in P99?

[Galaa]

Over the last few months of playing in P99, ive noticed that some things here are not as it is in classic. Is there any reason why they arent the same? Due to technical reasons or? If its technical reasons I can understand, however if its not, shouldnt the devs make it as close to classic as possible?

Here's a few of the things ive seen:

1) Night Blindness of Humans and Barbarians

2) Mobs not exactly the same in classic and P99 (example in classic, U can outrun Spectres in Oasis without sow. Here in P99, the specs are much faster)

3) Sgt Slate cant be trained to tunnels

Im sure there are many more, just couldnt remember them all for now. Anyone else notice things?