As someone who only plays this game to kill other players here are some additions me and the people I play with would like to see this will mostly contain things for Mains and deep Wilderness PKers.

Additions to the Blood money trader

-Dragon thrownaxe (remove from boss slayer shop completely)
-Elder maul (remove from boss slayer shop completely)
-Ancestral robes (remove from boss slayer shop completely)
-Kodai Wand (remove from boss slayer shop completely)
-Dextrous scrolls
-Arcane scrolls
-Torn prayer scroll
-Rune pouch (remove from untradable store)
-Torture/Occult/Dragon Defender/Fury/Godsword/Ward Ornamet kits http://2007.runescape.wikia.com/wiki/Ornament_kit remove any other method of obtaining these if any and upon death they should split into the item and the kit
-Scroll of redirection - Would allow the player to right click redirect wilderness obelisks to any level http://2007.runescape.wikia.com/wiki/Wilderness_Obelisk
-Grand seed pod - 1 click teleport to Edgeville that can be used at level 20-30 similiar to a glory http://2007.runescape.wikia.com/wiki/Grand_seed_pod Protected of death no matter what
-Combat experience lamp - set any Combat skill to 99
-Ecumenical key http://2007.runescape.wikia.com/wiki/Ecumenical_key

Reasoning behind removing some items from the Boss Slayer store is to give Blood money some actual value and items only obtained via using it.

Possibly a kill requirement of 25 kills to buy from the store, not sure about this one though just a thought to encourage people to actually go into the Wilderness before they just buy Blood money from other players.

Removed from the Blood money trader

Abyssal Whip
Barrows sets (encourages people to do barrows in the Wilderness)

Wilderness

-Fully working Resource Arena with boosted experience rates warrant the risk and entice people to enter the Wilderness. To enter the arena you would have to play 25k Cash each time.
-Remove bandit camp fishing and replace it with resource arena fishing for Anglers and Dark crabs.
-Agility Wilderness course and the experience moved it inline with rooftops with a Blood money reward every 5 laps.
-East Dragons (ONLY EAST DRAGONS) now drop Lava Dragon bones noted. Possible chance of 2 for gold members, however you can't teleport with them at 20-30 using a Glory. Lava Dragon bones should give 30k XP when buried. (x2 of Dragon)
-You're able to logout after just 6-8 seconds of no combat http://i.imgur.com/5Zd5XNQ.gifv
-Wilderness Obelisks
-Dropping items of high Value in combat while in the Wilderness
-Mage bank staircase NPCs added https://i.gyazo.com/2db2f96a420cad77...5cac3efdf9.mp4
-Fix running through gates that are closed after you click https://i.gyazo.com/1a105299d3498523...78e0ef9a35.mp4
-Fix NPCs attacking through gates https://i.gyazo.com/6ca1c2692ced91a8...8f9d2c8a84.mp4

All Wilderness NPCs respawn rates increased to 45 seconds currently impossible to kill anyone at an area where NPCs can hit you due to the 15 second respawn time
-Dragons at Wests/Easts/North of Graveyard
-Lesser demons at KBD cage
-Spiders at the ladder of KBD cage
-Axe hut East of Deserted Keep (need to be made aggressive)
-Pirate hut West of Mage bank (need to be made aggressive)
-Bats outside of Mage bank (need to be made aggressive)
-Hellhounds outside resource arena
-Zombies at graveyard (need to be made aggressive)
-Ice warriors and giants at Ice Plateau need to be added

I'm not sure of the current way the Blood money reward works for killing someone but I'd propose some sort of tier system based of the Wilderness level the kill was obtained these numbers are just an general idea and aren't final
1-10 = 7500
10-30 = 12500
30-55 = 20000

Bugs/QoL/Improvements

The bounty hunter overlay doesn't hide when selected from the BM shop trader
Move sharks to the general store
Sanfew serums (4) to the general store
Lumber yard teleports to the general store
Remove Dragon boots and Granite mauls from the Melee shop
Increase the price of the normal spirit shield to 250k
All items in this image moved into the stores for 50k per item http://i.imgur.com/3yRpzLu.png
Manual Pot decanting, really annoying when you're Pking with a lot of pots and you can't decant them when on low doses.

Any other thoughts I'll edit the post or make a thread