with the shift click option it has made the use of the inventory system just like before. for me

Are you just trolling or do you really not grasp the concept of persistance? These two extra clicks have to be repeated for every container that you do not want to have opened in the main window. It does not last beyond a session change and also those additional windows do not stack but each occupies screen-space and can't be accessed directly via something that is comparable with the old stack-tabbing. Some occupations amass several houndred, if not thousand clicks in addition to what they already do for "just" this basic functionality and then there is the loading time on top of that.

I think the inventory system is fine once you get use to it. Sure it needs some refining but i think they are on the right track.

CCP I WANT MY RIGHT BIG TOE BACK!

We have 15 Eve accounts of which one belongs to my wife. I personally spent 2 years to convince her to try Eve out when back then she was playing other MMO. Our playstyles are rather casual and generally just do some missioning to blow things up and loot / salvage to our hearts' content.

If you don't know yet, the current system simply takes away the fun for our regular activities and turned it into a rather tedious task:
The extra clickings
The extra space occupied by the new inventory window (means less to enjoy the graphics Eve have to had to offer)
The extra time it takes to load any wreck's contents
The extra navigation to loot each wreck

All these extra "work" and time spent are deducted from the pure enjoyments we used to get out of the missioning part and naturally, we decided to spent our limited recreational time with some other game that recently got released starting with "D" and ends with "3". As players, we naturally made a choice once when options became limited and playstyles of which we do not like are forced onto us.

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I'm a collector type of person, and I love Eve because of its sandbox nature, and the amount of things I can collect and have them show up pretty in my hanger. Once collected, I developed my own workflow to get into manufacturing and trading in order to obtain more items into my collection while sustain my in-game finance.

This new inventory UI is now giving me headaches, due to its nature of flow and presentation. To give the big picture, I have estimated assets value of 50 billion across all my characters, of which only less than 3% are cash. Now that's a lot of assets in items that I need to keep track of that are scattered in more than a hundreds of stations in the Eve Universe, from null to low to high sec, so at my major bases of operation where I have loads of assets to consolidate, now it's a lot longer to even load the items up not to mention to arrange them into categories that caters my needs.

I run personal mining OPs - with Orca of course, some POSes, PI to sustain POS and lots of trading aside from some regular missions and explorations. I run 3 clients simultaneously at least at almost any given moment and so screen estates are extremely valuable to me. Now these ops apart from exploration are severely affected in a negative way.

My personal computer used to run up to 6 clients before lag kicks in due to limited computing power client side, now it barely keeps up 3 clients with the same efficiency and most likely I'd blame that on the extra load the new system seems to cause - hence, server side.

New system is not hard to learn, but unnecessary hassel remains, so for the mean time, I'll simply let my accounts lapse until the situation gets better or a solution offered. I unachored my POS, unrented all corp offices, so no upkeep for me and I can simply decided to start paying again when the time's right.

TL;DR
New System:
lacks the ability to present information flexibly
is a huge resource hog and causes performance issues
lacks the abilityto arrange inventory with heirachy
takes up valuable screen estate
did not consider deep enough on complex workflow and only focused mainly on visual presentation
lacks the ability to turn it into an optional feature
lacks the ability to import/export filters (very important for multiple account holders)
give little incentive for people to run any coorperative contents (Even PVP with carrier refitting on the fly)
on average requires more stress and focus to do large amounts of operations on asset arrangement between entities.

very sleek and streamlined for solo players who has little need to keep non-liquid assets and no set base of operation
easy to hand-on for new players who just started, as it contains familiar interface most modern OSes has to offer visually

Won't consider actively playing and paying in since the enjoyment value per dollar and time put in are significantly lowered.

Okay, in addition to what i originally said - I think the system is okay in principle but your ships cargo hold and drone bay should be separately from the unified inventory.

You can shift-click your foot, to make a new toe spawn. Afterwards you can drag and move it to where you want it and even adjust it's size! However you'll have to do that, whenever you change your foot-wear or leave the room or get out of your bed.

Am I the only one who merges the item and ship windows in the station bar? I can't imagine people using separate windows to move around ships and cargo inside a station, that would just be tedious even before the new inventory thing.