Seems like most of those drawbacks have to do with having an underpowered machine. I don't need to transcode any of my footage, including multi-cam projects, so no waiting for that.
What NLE actually does good motion graphics? That's almost always a job for a dedicated graphics program.
And X does output a relatively small number of file types, that's why Compressor is a thing, just as it was for 7.
For number 8, isn't that a lot better than having no background rendering at all (FCP7)?
And though I have no experience with this, the presenter in the video I linked to earlier states that FCPX does recognize footage from servers. Maybe it just takes some googling, I wouldn't know.
Keep in mind I'm not trying to say FCPX is perfect, or always the right tool for the job, but I do think it gets a lot more criticism than it deserves. I think the Adobe ecosystem is great. If Premiere had the elegance and workflow of FCPX then I wouldn't hesitate to use that instead because of the easy round tripping you can do with their other programs. But I just can't go back to the clunkiness of it. That's just me.
I do think color correction in X is very limited, as it was in 7, except now there's no Color. Resolve Lite is a no-go for me until I get a monitor with a high enough resolution, so until then, I'm stuck with Magic Bullet. But pros can use Resolve just fine via XML.