Does anyone feel like the new mineral nodes look a little too bright? They seem very light and tealish as compared to their deep blue counterparts in the original. I know it's a minor thing, but I really like the old mineral color scheme.

Turn off real time lighting

Real time lighting ruined the remaster. Just disable it. I pray to the gods they wont use that setting in tournaments.

EDIT: SCVs look like they're made of ash....

And at the same time team color on units is very dull. I watched Jayborino play the campaign today and it was hard to tell purple wraiths from white wraiths, how come?

Yes to all of the above.