How can I manage all of my skills on hotbars?

[Krindor]

Can you not just use the other alt and control on the right for the other half of the keyboard?

Would have to let go of the mouse to do that, that would be dangerous in any scenario where you need to dodge, don't see a way to quickly control your character without the mouse.

[Masekase_Hurricane]

Would have to let go of the mouse to do that, that would be dangerous in any scenario where you need to dodge, don't see a way to quickly control your character without the mouse.

Can you not lift up your hand and move it to the other side of keyboard and press the other control/shift? Your other hand can still stay on the mouse.

[FinaSel]

Can you not lift up your hand and move it to the other side of keyboard and press the other control/shift? Your other hand can still stay on the mouse.

I don't remember what an English keyboard looks like, but the Japanese one has a lot several more keys in the top row and bottom row.
The Ctrl key is quite far from the number keys.

If I move my hand to reach the control key on the other side, the only keys I can comfortably reach are 0 and 9, and it's quite awkward.
Not to mention the size of the Ctrl keys are smaller, and the right shift key is also very small.

When I'm playing with the standard movement controls I move the camera with either "A" and "D" (which turns your character as well) or I use the arrow keys with my right hand. If I need to quickly see behind, I press "V" which reverses the camera.

I see. The arrow keys move the camera as well. It will take some getting used to, but I will test it out.

The number pad keys though seem to have several functions, none of which I've ever used. Are they important? Can I safely remove / change them? Or do I need to reassign those keys somewhere else.
Now I can see how it is possible to control the camera without a mouse.

Q and E are my target left to right, and R and F are my target up to down.

That's interesting. I've been using Tab or the mouse to select targets (Or a keybind for "target target's target" so I can always target the tank's target or the tank.)

[Lilyth]

I see. The arrow keys move the camera as well. It will take some getting used to, but I will test it out.

The number pad keys though seem to have several functions, none of which I've ever used. Are they important? Can I safely remove / change them? Or do I need to reassign those keys somewhere else.
Now I can see how it is possible to control the camera without a mouse.

I never really seemed to miss any of those functions. Also don't worry about reassigning any important keys, you can always click "default" to revert them back to their original positions. The only functions the game makes sure you need to have assigned somewhere are "confirm", "cancel" and "escape". But the system always tells you that if you mistakenly erase them.

The advantages (for me) of using the right number pad is that it gives you soooo much available keys, all close to each other for easy access (0 1 2 3 4 5 6 7 8 9 / * - + . , ENTER). After they are all taken out, you can use some modifiers such as "ctrl", "alt" and "shift" to effectly quadruple the amount of available keys. It takes a little while to get used to, but the recent ability bloat issue hasn't affected me too much. I've barely started to use my second modifier (alt) and I already have all my skills mapped out, includind PvP and pet ones.

But I still rather SE don't give us even more abilities in 4.0 because even with so many keys, it can be a pain to map and keep track of all of them x_x