Some facts:
1) Terminator issues have been fixed in 1.6 already:
https://corona-renderer.com/blog/corona-renderer-1-6-for-3ds-max-released/
2) The only tech from V-ray which we have implemented right now is the DMC sampler. It has nothing to do with flickering, light leaks, or artifacts. It was already present in the 1.6 hotfix 3 version, so it's not specific to 1.7 builds.
3) The new tech in the newest builds is our in-house light solver. It greatly speeds up rendering, but may sometimes produce square-shaped artifacts. We are working on a fix.
we need to do more animations and especially interiors with many lights to make sure it is not just the settings in this scene or bad modeling and materials from our side, but if you watch my animation on
go to time 00:30 and till 00:40 and look up and right at the ceiling and go to 1:09 till 1:19 it is more apparent in the ceiling there
the client did not complain actually they loved the whole thing but I was too much reminded of the Vray era,
I used path tracing I always use it whether I have animated objects or not.
it could be some minor settings or mistake from my part or lights improvement to tweak and it could be because it was a daily build in any case just something to keep an eye on some clients and some projects might not pass the approval stage if they flicker too much.