Have fewer artificial barriers. That is a huge immersion breaker. If cliffs were tight but required some time and gear, if boundaries were not literally wooden fences we could jump over, if oceans weren't literal walls but rather obstacles that could be RS gold swam over if you had the ideal equipment, that would be fantastic.
There's monsters, but nothing to bind you to the conflicts, there is training areas, but no grounds to use them. You don't get lost in the fantasy of the landscaping since there's nothing to get lost in apart from aesthetics, and you're just twiddling your thumbs waiting for to another port of call, which, may go partly hand in hand with your suggestion of raising the problem, but it will take more than that. Very very good point. Jagex has done a couple of things to adress this, but it doesn't really work for veteran gamers. I went to Karamja to pursuit, like I went into the desert and Morytania. That is the big reason to go to those regions, but the problem is that once you're done there, you are done.
Slayer. That could bind you to a struggle, and the point is that you travel to these areas to fight. Regrettably, a great deal of slayer is bound up in dungeons, but that is a necessary result of making some places accessible to everyone: unless I am wearing the right equipment, I can not realistically run through a place with, say, aberrant spectres. Hunter. This was an intriguing skill for Jagex to include, because it allowed them make people use more peaceful areas. Chinchompas, Kebbits, even birds (until BurthoTav) needed one to get out in the wilds to capture them. That was a fantastic way of making people go from civilisation. True in members for the dwelling rock caverns.
Woodcutting. Teaks and Mahoganies were/are infrequent jungle trees. Unless they include many exceptional tools to every single map place, what do you suggest they do? Most resources need to be implemented very carefully to be at all useful: Mahogany had the building skill, some hunter regions needed summoning, and so forth.
I do believe the map should be a bit bigger (personally I'd like to see more small villages etc with a lot of farmland, could be useful for quests). With more land, Jagex has to work with. For me, the closeness of Varrock, Edgeville and Gunnarsgrunn (a much better name than Barbarian Village, I despise the term barbarian unless used correctly) feels wrong. If it were up to me I would make the buy rs gold paypal game bigger, make the towns bigger and make them feel much more alive. Falador doesn't feel really city-like to me personally.