Media Replacement + Plug-Ins
AE is like a Build-a-Bear. You start with the default, and then you dress it up. Plug-ins are essential to After Effects. As essential as pants on a Build-a-Bear.
Media Replacement is a great new feature, especially for MOGRTs. But you can't export a Media Replacement MOGRT that uses plug-ins anywhere in the After Effects project. I understand performance may be bad, but a warning that the MOGRT will be slow is preferable to never being able to combine MR and plug-ins. This is a hindrance for professional pipelines considering adopting a MOGRT workflow for motion graphics.
Please reconsider enabling plug-ins and MR to cohabitate inside MOGRTs for Media Replacement v2.