I hadn't really got the big deal with players complaining about running into NPCs. Since everyone died in Ardoris, it's been pretty easy to get around them. That is until 2x XP, and I went to Highvale Outskirts. Prepare to be slimed. Now I understand why new players complain a lot about this. In the Monastery you are constantly getting caught on NPC's, and it gets pretty annoying. Rather than change the whole system, take a look at Highvale Outskirts Monastery and see if you can alleviate the problem there.