> May nobody else have to suffer through writing an interoperable HTTP/1.1 parser!

Yes, now it'll be much easier than parsing plain-text. Now they just have to write a TLS stack (several key exchange algorithms; block ciphers; stream ciphers; and data integrity algorithms); then implement the new HPACK compression; then finally a new parser for the HTTP/2 headers themselves.

Now instead of taking maybe one day to write an HTTP/1.1 server, it'll only take a single engineer several years to write an HTTP/2 server (and one mistake will undermine all of its attempts at security.)

If you are going to say, "well use someone else's TLS/HPACK/etc library!", then I'll say the same, "use someone else's HTTP/1.1 header parsing library!"

HTTP/2 may turn out to be great for a lot of things. But making things easier/simpler to program is certainly not one of them. This is a massive step back in terms of simplicity.