Can ARM Chromebook Performance Be Improved from Updates?

So, I LOVE my new Arm Chromebook, though there are a few issues that I was wondering could one day be improved merely from updates.

For instance, streaming ANYTHING (Rdio, YouTube, Google Music) while doing anything else causes a lot of lag. Is that due to Chrome OS not yet fully optimized for ARM? Does that even make sense? (Not quite sure)

Also, there's often times when I try to resume from hibernation that the screen remains dead, and I have to physically turn it off. Again, software optimization problem?

I also notice Chrome likes to refresh all my tabs at certain points, and I have no idea why.

So, yeah. Would simple, future updates be the solution? Any word on this? Or, should I get the 550?

Thanks!