Personally, I'm most likely in the minority here but the return of invisibility is doing the opposite of what the dev team was specifically trying to do with the rework. Having more "generic" wizard spells isn't the solution.
I’d rather see our mobility expanded in a way that reinforces the class identity. Allow Spellblade's to solve travel/escape problems through phasing, teleportation and telekinetic movement, not invisibility.
Something like letting Phase Strike/another Phase ability target allies again, or giving us a limited forward blink/escape, would feel much more unique to the class. Getting to camps outside is really not that difficult on mount or with a SOW.
Inside of a cramped dungeon or deep in Tel Elkir, yeah I can see it being a challenge, but thats why you bring supplies and with the Ranger rework, you can effectively stay camped for awhile now. Plus you have a full aggro dropper in your kit. SPB has a decent amount of escape at the moment. A short range blink, would be nice for an emergency distance utility.