We just need to add CAPTCHA to access an asteroid and everything will be fine. (^_^)

It would also remove the needed daily downtime to re-spawn the asteroids. Because they would regenerate via magic just like PI does.

No, no and a bit more no. All this will achieve is having less miners overall. The people who multibox miners will have to go to one or two miners as they wont be able to do all the minigames at once. There would be more hulk ganks throughout high/low and null, because the miners who already get one of the lowest incomes of the lot ahve to concentrate on a silly little minigame instead of watching local/d-scan. CCP has already stated they dont want to change the mining mechanics as it gives a time where people can chat and be social.
Now ive been a miner for over 2 years and I for one do not want to have any silly minigame to contend with to make my isk. All it will achieve is making your ships double / triple in price, as the multiboxers will cut the amount of miners and the people who try the new mechanics will just get bored of the minigame and go back to whatever else they were doing.
And if you think this is because ive lost hulks to suicide gankers, go check the killboards, ive only ever lost one mack in null sec due to a silly mistake and missreading where a jump bridge was.

Seriously your point of view seems too "lazy" for me.

So you want mining to keep beeing boring so you can chat... lol? The other reasons are silly, I personally don't care about multiboxers with 9 accounts, first of all Im against these type of players because I don't think they are actually enjoying EVE, just doing a "second job".

If mineral prices rise then it's OK, mining will be more entertaining and profitable, whats the problem exactly?

It wont be more entertaining, Ok maybe for the first what 5 minutes then itll just get boring, people will stop mining and the economy will collapse. once the stockpiles have collapsed.

Now I have lived in every part of eve apart from the drone regions, I have tried alot of different things in EVE. But the thing that keeps bringing me back is mining. And the line "So you want mining to keep beeing boring so you can chat... lol?" er yer this is a online MMO you know massively multiplayer so you talk to other people and chat with people. I cant chat with my corp mates while ratting, missioning, pvping. I can however while I am mining. I have been with the same group of players throughout the 2 years I have been playing in one corp or the other because while I am mining I chat them and we know each other well.

Seriously your point of view seems too "lazy" for me.

So you want mining to keep beeing boring so you can chat... lol? The other reasons are silly, I personally don't care about multiboxers with 9 accounts, first of all Im against these type of players because I don't think they are actually enjoying EVE, just doing a "second job".

If mineral prices rise then it's OK, mining will be more entertaining and profitable, whats the problem exactly?

Multibox is possible with this system. You will just not be able to choose exactly the ORE you will recolt. Note that most Asteroids will have an ORE more present (70 to 60%). Some could mix ORE of the same rarity (40% Veldspar, 30% Pyroxeres, 30% Scordite) but these should be exceptions.
I did not mention the size of the asteroids because the system would not change for this point: Highsec will have smaller asteroids than Lowsec.
So in LowSec, scaning asteroids will be even more important to get Rarer ORE.
The system could also introduce Rare ORE in highsec (Arkonor 3% in some Asteroids) Just an idea.

Another option could be that the priority of the ORE could be set by the Mining Crytals you put on your Strip.

In this option the scan would only give you the quantity of each ORE contained in the Asteroid.
You could imagine a first scan that give you the quantity of each ORE in the belt, and a second that will show you the Asteroid that contain the most of the ORE you want.

Multibox player could without scaning choose the ORE that he will recolt in priority.

Edit: I thought this topic would interest more people ;-)

I'd prefer bigger rocks and you would have to manually target different areas of it to sustain the maximum yield. Of curse with the proper skills to know where to target. So someone might afk mine for 2h at 22% yield to get his cargohold full and another one would adjust every 5-6 min and mine for the same amount 24 min at 100% yield.

Any system that makes mining less favourable to multibox and more favourable for those who control one ship at a time will be a good thing for the mining profession as cutting down on the overall number of miners will boost the price of minerals thus making it a more profitable endeavour.

The result may very well draw more actual players into the mining profession to fill the void made by losing the multiboxers.