This is getting a bit off topic. But I believe PPP is included by default because it might be required for Internet access. Which makes it hard to install as an addon package. At least if we are serious about OpenWrt as a firmware alternative for the main/only CPE. Depending on some other Internet access, even temporarily, is not really an option IMHO.
that makes sense.
Will performance get worse or better if I switch to
There's one way to find out.
I'm wondering if mbedtls takes advantage of some hardware capabilities that wpad-mini can't for more performance.