Agreed. I was playing a druid, and felt pretty much on par with the martials, which is a good thing in my book, but which someone used to 5e might not like. The build versatility more than makes up for it, as far as I'm concerned. (I mean, that's a big part of why many choose Pathfinder 2e over 5e anyhow, you get to make meaningful advancement choices just about every level, rather than when you choose your subclass.)An additional general tip, specific to going from 5e to PF2e, the spellcasters will feel a looooott less powerful and martials will feel a looooott stronger, especially at early levels.
The balance they've struck is very very good, but players coming in with a 5e spellcaster mentality will be in for a bit of a shock.
Also regarding spellcasters, "multiclassing" & archetypes also don't just continue the full caster spell slot progression. You have to spend feats from your base class, and those come with fewer spell slots. It's still a meaningful addition to your character though and hoo boy are there lots of options starting with the Advanced Player's Guide. (The core book just presents the base classes as "multiclass" archetypes.)
I don't have much more to say since my play experience was limited, but I've been eyeing that thaumaturge class in case I ever do stumble into a new campaign. It looks like gobs of fun.