Subtiles are huge. This does not happen with any other player. I can’t adjust size or placement. This is a major issue and needs to be addressed. I’m using the new Apple TV 4K.

I don’t see this problem at all. Do you have an example movie or show you’re seeing it in?

More flexible options for both subtitle size and placement would definitely be a good thing. I can’t see a reason not to have it.

Brightness settings and thicker borders is also a must.

If you have a chance to upload a sample it would help us look into this further.