The most recent two books (big fight spread over two books) were a lot of fun. I finished them and am eager for more.
That said, there are definitely some issues with the series a whole that are either papered over or ignored:
-increasingly implausible that the muggle world continues to not believe in magic (and in fact these two books seemed to be very clearly leading up to “and now the magic world is exposed” before seeming to chicken out)
-increasingly implausible that the council and the wardens continue to be suspicious of and hostile towards Harry, despite him obviously being the most important person in the entire world. (Clearly it’s reasonable for them to be suspicious and careful behind closed doors, and treat him with kid gloves… but they’re constantly openly antagonistic towards him.)
-lots of ludicriously-overcomplicated-villain-plots where there’s things only work out for the bad guys if 19 consecutive things all happen in precisely the right order, including two good guys communicating in step 3, but not FULLY communicating, yada yada yada
-repeated introductions of brand new baddies and organizations which there’s no possible way Harry (and the readers) shouldn’t have heard of up until now
But, again, super fun books, lots to recommend them. Just grousing a bit.
Regarding the last point of your spoiler:
I think you’re forgetting that Harry did not have anything like an ordinary training. Justin focused solely on things that would mold Harry into a very specific image, and Ebenezer had to focus on undoing the damage.
It would be like, in our society, if somebody was home-schooled to be an excellent farmer (soil knowledge, crop nutrition, etc.), and the teacher didn’t bother with any non-farmer education. An 18-year-old under such a regime would have a college-level education in farm-related matters, and at best a 2nd-grade education in many other subjects.
I’m specifically referring to the library of congress people who show up at the end of the most recent book. I agree that Harry has had a very focused focus his entire life. But they are 100% directly within that focus, namely, the boundary between the magic and mundane worlds. You’d have to work very hard to convince me that, knowing they exist and what they do, it makes any kind of sense that he has not encountered them and no one has ever mentioned their existence to him at any point up until now.
Yeah, that group especially seemed rather implausible, given that there really isn’t a “masquerade” in the Dresdenverse. The supernatural doesn’t take any particular pains to hide its existence (Harry listing himself in the Yellow Pages is considered gauche, but not punishable), and just stays hidden as a result of us normals just not wanting to know. Anyone who takes a serious interest in the supernatural quickly finds themselves with all of the knowledge they need, like the Churchmouse thief. So what the heck have these Librarians been doing, that there’s still anything to hide from them?