I post this in hopes they can add some of these things to improve the shop experience and give players what they want and also earn more revenue to hopefully use a portion of that to improve the games bugs and deficits like dupe defense. Players want to support the game and buy cosmetics they just want them to have good value.
WARNING: Inc Too Long Dint Read Post! (Pls read! 
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1] Alternate Skill Effects. How cool would it be to have blue colored incinerate or whimsywind (whirlwind change to random colors every 3 seconds), or meteorite druid boulders? These would sell so well. At least 3 options per skill. More choice = more spent!
2] Expanded Storage options. These would be premium high value storage and not just like our current ones. Affinity choices would allow you to make items go into these automatically at the click of a sort all button in inventory. So you can highlight the rune tab and select rune affinity and all runes you get will automatically sort in this storage when you hit sort all. This obviously would require them to sort out the current load other stashes issue before implementing. Each of these is limited to 1 unless noted. The unique tab you can buy up to 4 and set affinities for 1 GA, 2GA ect. Here are the 8 new storage options:
A] Unique Stash. 1 Spot for each unique in the game.
B] Rune Bag. 1 spot for each type of rune in the game. Runes here stack to 1000.
C] Elixir Cabinet. 1 spot for each type of elixir in the game.
D] Boss Materials Hoard. Boss mats stack to 5000 in this tab with 1 spot for each type of mat. Items here count as being on your character so you can run bosses without carrying items.
E] Magic Trunk. The Magic trunk is a normal size stash that you can access from anywhere using the magic trunk button in inventory. Anything in the magic trunk is counted as being on you so if you have whisper keys in there you can open whisper chests without carrying them.
F] Mythical Chest - This holds up to 100 mythical items.
G] Black Market Box - Items here are put for sale on black market vendors in each city. IF your item is purchased by another player, then you earn 1 black market token that you can claim at any black market vendor and the item disappears. 1 token buys any item. Players can also buy 1 token per day per account with 100m gold. Tokens are tradable. Items bought on the black market are bound to your account. I realize this is complicated so its just an idea.
H] Penti-tab - Equal to 5 normal tabs. This has a premium cost. Limit of 5.
3] Mounts with abilities. This would work like the pets below. Each mount category would have an earnable on in game with the premium versions shop only. Here are some quick examples:
Mount - Stygian Battleforged
Category: War Horse
How to Get: Earn in game
Ability: 150% harder to dismount. 50% more horse damage.
Mount - The AEther Steed - Bright Blue with blue flames
Category - War Horse
How to Get - Shop
Ability -150% harder to dismount. 50% more horse damage.
Mount - Flying Carpet
Category - Magic
How to Get - Earn in game
Ability - 50% more acceleration. Can overcome small elevation changes.
Mount - Covenant of Cain - Magic sparkle trail.
Category - Magic
How to Get - Shop
Ability - 50% more acceleration. Can overcome small elevation changes.
Mount - Hellhound
Category - Beast
How to Get - Earn in game
Ability - 20% faster in helltide.
Mount - Cerebus
Category - Beast
How to Get - Shop
Ability - 20% faster in helltide.
4] Pet with abilities. Not only this but I do think there is room for pets to have 1 ability as long as everything is earnable in game with at least 1 version of that pets ability. I made a post on this already = Get a Pet save your mouse clickies! 
- PC General Discussion - Diablo IV Forums
5] Eye Popping Dyes. Too many drab dyes that dont pop are in the game. Please get some really shiny eye popping dyes going and let us buy these dyes and color multiple pieces. Sell them in batches of 20 uses for some reasonable amount or moderately more expensive but unlimited uses.
6] Extended Premium Battlepass. The battlepass can be completed quite fast. I propose another tier of pass for the dyehards out there that has tiers 91 - 180. This new expanded pass would include titles, pets, exclusive dyes, chest color options, alternate art cosmetics for specific uniques, alternate wardrobe furnishings and colors, new portals, ect. Very rewarding cosmetic items!
The 180 tier would be a themed cosmetic set with armor, weapon, mount, title, character portrait, and pet only available in this pass.
7] Waypoint Stone. This new item lets you place a waypoints to use. If you run Duriel quite a bit then buy this and drop a waypoint there. Lasts for 1 season. On eternal also lasts until end of season. These are affordable and come in batches of 5.
You can only have 5 total waypoint stones set. Modify these in the new waypoints screen.
8] More Themed portals. IF I am running a lightning build I want a lightning portal. Same with fire or poison or such. Some of current ones line up but we could use more of them and flashier ones as well.
9] Boot Footprints. Very popular item in other games.
10] Character Rename. This is such a needed feature for those wishing to fix a bad character name. This needs to be cheap to use. Maybe even 0.99$. You could combine this with the pets to be able to name them when bought and then rename them as well.
Thoughts on this? What would you add to the game for cosmetics?
Please keep it civil and constructive! 
