Thank you!
How is this any different to a normal tier 2 visa? In terms of you still needing to find a sponsor that is govt approved and you are then tied to that sponsor to be able to stay in the UK?
Basically, the new immigration changes have been brought in to end the EU allowing their "Free Movement" to the UK and to end all the routes to the UK that the European Court of Justice allows for non-EEA citizens.
With that in mind, you can see how you must have a work sponsor for a visa to the UK and how that employer must have a licence to be able to sponsor. Tier 2 General visa holders are already free to change sponsors. But there is no more having to pass a RLMT and no cooling off period (outside the UK) as the UK wants the skilled workers.
Unsurprisingly, gone is the one-man-band limited companies (contracting) and the self employed, that the EU allowed to be in the UK. The UK's Tier 2 General visa never allowed contracting and for an entrepreneur (those who have companies that will create jobs for British citizens) the UK already has a visa for these.