Sean:
If links golf is one's be all and end all, Pasa won't be one's cup of tea. There are trees - lots of them - and though many have been thinned and some removed recently, well... it's still a tree-lined course, and would feel absurdly tight to one used to playing on treeless links.
In Mackenzie's day it wasn't that way... but sadly trees do get planted, and do grow.
In any case, David is correct that 6-7-8 were at one time pretty much one big open field... the story goes that someone was killed on 8 green by a shot from 7 tee, and thus blocking trees started to get planted.
As for the bunkering, well... that's just Mackenzie's "thing", you know? One either likes those or doesn't, again. That being said, there are none at Pasa that are superfluous - even the short ones on 3 and 4 give great meaning to the hole for the lesser players. And keep in mind it's a pretty short golf course, even with the hills. Take away too many bunkers and a lot of the challenge is gone, if not the thrill.
TH