1) At Adjustments and Effects - Synchronization - Advance of subtitles over video
the popup text says: "A positive value means that the subtitles are ahead of the video".
I found this ambiguous because it does not distinguish between the purpose and the result.
Therefore please change the popup text to:
"A positive value delays the subtitles"
2) At Adjustments and Effects - Audio Effects - Spatializer
The texts under the 5 sliders are too small to read. Please make them bigger.