My Suggestions on Features You Can Add

[Dustin-byte-byte]

When you hit a player or a mob with a critical land, it could make the sounds of a gun or the sounds of a steel bar dropping, you guys decide :))
TLDR: Sound Effects on Critical Hits

Like the doors with windows, add an option to add windows to shields for more visibility
TLDR: Shields w/ Glass

Make villagers talk
TLDR: Talking Villagers

Add realistic thunder noise
TLDR: Realistic thunder

Add customizable block outlines
TLDR: Block outlines

That's all I have in my head rn, I hope you guys can see this ^^
TLDR: Byee

[SquatchHunter]

aside from the overuse of TLDR...
custom sounds is not something we would likely do.
shields with glass is an interesting thought but wouldnt lower shields solve the issue?
talking villagers...? you mean like change their random sounds to actual voices (and if so likely not something we would do)
realistic thunder, its already pretty "realistic", it goes boom.
block outlines is maybe something we could do, there is a very faint outline on bedrock but changing the colour I am unsure about

so maybe 2/5 are in for consideration, the rest idk...