Not Really an Issue more of a question/suggestion

I have been working with CHTmultiregionfoam pretty heavily and I have noticed on all the mapped boundaries there is no way to relax them. This then forces them to rely on the relaxation of the neighboring systems to remain stable at high CFL or you are limited by the CFL or you are forced to perform large numbers of iterations to ensure convergence. This is due to the explicit nature of the mapping procedure. I could be mistaken but I have built custom boundary conditions from Mappedflowrate and then the mapped condition and the BC's I created were unstable unless I added relaxation in. So after that long winded explanation, my question, "Is there relaxation features for the coupled boundaries themselves?" and if the answer is no, "Is there any plans to include them in the future?" and just to clarify my boundaries are relaxed independently from the main equations with entirely different relaxation and allow for much faster equation convergence without having to reduce my time steps. In some cases in improved stability drastically at large time steps.