1.)The ability to track probe values over time (or at least for each saved timestep) would be really good to assess convergence in addition to residuals.
2.) If a Ux,Uy,Uz vector point is located outside of the domain (i.e. in a building) OpenFOAM reports the length of the resulting vector as basically infinity. I usually just look for large vectors and cull them, but it could be good to add a filter option for this.