Inserting new RVOController into hard-packed group

I have a hard-packed group of RVOControllers, and I’d like to insert another RVOController into the middle of the group, then have the group grow to a slightly larger packed group. When I insert the new controller, the previous controllers will correctly move out of the way, but they do so very quickly (almost instantly). I’d like this process to happen in a slower, more natural looking manner, but I’m having trouble doing so.

I’ve tried giving the new RVOController a radius of zero, and slowly growing it outwards, but this doesn’t help. The expansion process still happens almost instantaneously.

Any ideas on this?

The only way, I think, would be to either reduce the simulation fps on the RVOSimulator. That might give the correct effect (or not, have not tested it).
It might also work to reduce the RVOControllers’ Max Speed.
If this won’t work for you, I’m sorry. The RVO system is very strict on maximizing the velocity to get out of collisions.