Avoid These Expository Imposters

“Sequential sermons walk line by line through the text. This certainly isn’t wrong… But it isn’t necessarily synonymous with expository preaching. It’s possible to walk line by line through a text and never make its meaning clear.” - TGC

Discussion

When it takes you 200+ sermons to preach an epistle of <3000 words, you're not preaching that letter, you're doing biblical theology. It's not wrong, but it's not expository preaching.

I like to take my time. I like to preach every possible point I find in the text. That sometimes means a topical message focused on just one word (in its context). Sometimes it means working through the logic of a whole paragraph. Sometimes it means isolating each point in that paragraph as its own message. Sometimes it’s a broad overview to tie everything together.

To me that’s expository preaching.

Rushing through a book in a few messages leaves a lot on the table. I can do it but it usually gives me hives just to think about it

Maranatha!
Don Johnson
Jer 33.3

I don't think there's anything wrong with your approach, but I also don't think it qualifies as "expository." FWIW