Luckily, since GitHub has a pretty extensive API, this leaves the way open for third-party code review solutions like https://reviewable.io https://reviewable.i

Luckily, since GitHub has a pretty extensive API, this leaves the way open for third-party code review solutions like https://reviewable.io https://reviewable.io (disclosure: I built it). But yeah, considering how long it took them just to put in a split view, I wouldn't expect a whole lot of improvements in the foreseeable future...