Have you seen the
Witty ESP8266 boards touliloup? They look really nice as they also have a more modular design allowing you to completely disconnect the USB section. You get a LDR and RGB led pre-attached as a bonus (or hindrance, depending on your project, I suppose!). The Wemos D1 Mini does look nice also though!
I do have to admit having to use an externally accessed web page to configure is a bit annoying, since the Oak still sets up it's own AP, but you then need to configure with another device that has to first have internet access to do the particle login, and then switch to the Oaks AP to finish it. Especially as you shouldn't really need to after the initial install. Would have been much nicer to be able to have the file served by the Oak, and just be mean and make you put in your Particle Access token or something to provision it, making it a bit more self-contained.
I do serial debugging with the Oak, but I do agree it looks to be much easier with the Wemos, and should also be with the Witty, due to the onboard/plugin USB-to-serial chip. I made an adapter that my Oaks plug into in order to debug them or do serial updates. Since I'm starting use the extended stackable female headers for the Oaks, I can plug them into a breadboard AND still have a female header on the top to connect to, or plug them into the programmer, and also plug that into a breadboard if I want. Then I just connect a loose serial adaptor to the end three connectors, or plug one into the female header on the end.
All in all, the Oak has been the best ESP8266 experience I have had to date, in reliability and flexibility, but there are certainly some other options out there
