I haven't gone over the changes in detail, specifically the new subclasses but also looking for other changes since February. The XGtE spells was a good add. I think they updated the Infusion list which is somethign I wanted, but I need to compare.
I still don't like the turrets from the Artillerist. They don't scale, becoming less important than a cantrip. They are in that in-between place of using an action to summon, so I can't look at them as just a damage boost like Hex or Hunter's Mark, but a bonus action to use, so I shouldn't expect them to do scaled cantrip damage. Though the temp HP one seems quite nice. Add in a paladin with auras and the team can turtle up well.
The change for multiclassing rounding of half-casters is one that was discussed her in geenral a few months back, and I started against it but was convinced I was wrong - all rounding up does is keep it on par with normal casting in almost every case, vs. being a big hit to the half- and third-casters much of the time. So I'm for it and would love to see that become official errata.