Like it or not, it'll make it to the market someday. I tried to rush it at home 2 years ago.
Messy, I know, it was being properly garage developed then: no sleep, tools and stuff all around, pizza portions and empty beer cans among spanners and solders.
Later is was used for a year with no big issues, main problems were loose connectors but it was solved buying some expensive stuff from Hiroshe.
It controlled front and rear mechs, front compression, lock out, TALAS, and ProPedal. Telescopic seat post would be nice and not difficult to build.