If Uber is going to implicitly make tipping a requirement to not feel like a jerk (as with Lyft), but without copying Lyft's ability to tip from the app, suddenly Lyft looks a lot less unattractive by comparison. Now that I know this is starting to become a concern at all, I would switch to Lyft immediately if they just added a setting for a default auto-tip that would be factored into fare estimates.
I really don't understand this aggressive, cutthroat effort to compete on price at the expense of their drivers; I can't be in the minority in considering price a secondary concern to the overall UX, so long as it isn't unreasonably inflated like taxi fares. Is it possible that the underlying model of ridesharing isn't actually particularly more efficient than the taxi industry, and that Uber/Lyft rates will naturally converge with taxi rates over time as they gradually stop subsidising rides and/or underpaying drivers?