I would support a release that had bugfixes as its focus, but I wouldnt go as far as a full freeze. Partly because I suspect that some epic teams (or however they organise) are going to have much less to contribute towards bugfixing for a multitude of reasons, and also the state of some systems that are being rewritten may make it advantageous to press on with finishing the new system that will replace the old one rather than try to fix some longstanding issues with the old one. As of right now the work on the new Audio Engine springs to mind as an obvious example of and since it is experimental in 4.16 and hoping to be ready for 4.17.