I want to start by saying that the new avatar scaling feature is great. Opening up the joys of expressing yourself to more people is a good thing, and I'm glad that it is finally coming to VRChat.
There is however a very big issue here. As you may know, there is quite a large community of macro and micro enthusiasts. For these people, 0.2 meters small is not small enough, and 5 meters big isn't nearly big enough. I understand that this is a very niche thing and why these limits are in place for the built-in scaler. Luckily the size community had its workarounds with custom scalers. We could go as big or small as our hearts desired. Entire communities were built around these large size differences. Friends were made. And good times were to be had. Now however this is all in danger of being lost. It has been confirmed that the only reason these custom scalers still work is due to a bug that is likely to be fixed soon. This would destroy entire groups that were built around our shared enthusiasm for extreme sizes.
My suggestion is to keep the built-in scaler as it is. It honestly is really good for most people. But for size enthusiasts, I recommend implementing a way for custom scalers to work officially. Allowing us to tinker with scaling from unity in an unrestricted way opens up a lot of creativity with what people can make. For example, custom scalers can fix and animate other things besides the base size which opens up a lot of opportunities for cool things. Most people will continue to use the built-in scaler and that's fine. But this would also ensure entire groups don't get screwed over any more. If the concern lies within breaking game worlds or being annoying in public lobbies, then if needed limit these features to private instances only. All the size meetups happen in private anyway because we don't want to bother anyone, we're just here to have fun with each other.
I've seen mention before that further tweaks to the system might be considered for later development. But as we all know, development takes a long time. This built-in scaler feature has already taken a long time since EAC was first introduced. If you set this issue for a later date, that would mean that VRChat will be less welcoming for the larger size community for an undetermined amount of time.
There is no other home like VRChat for us. If custom scalers go away, and thus also the ability to scale huge or tiny, that would negatively affect this part of the community. I ask the VRChat team to reconsider this issue. If the concern is size misuse in public, I can almost guarantee you that it won't be much of an issue. Most people will use the new built-in scaler, only the people who love this part of VRChat will be using custom scalers to continue to have fun with their friends.
At the very least I would like to keep the discussion about this open. I know a lot of people are very concerned about the future of their favorite part of VRChat. It would be a very sad thing to see this disappear.