Removed DX9 and speed optimizations

Hello Dolphin Dev Team,
I have a question about the optimizations you talked about, in the removing DX9 news.

I would be interested to know, how much the optimization will improve Dolphin speedwise.
Will it balance each other with the accuracy, or will Dolphin become faster at some point?

How
much is done in Dolphin in terms of the emulated graphics and accuracy?
How much you are able to emulate, which is still missing
after over 10 years of developement, which is quite some time. Did someone started on the speedwise optimizations yet?

So all in all, I would be really interested in a report of the status of the emu. :-)

Thx in advance and thx for all your effort!