Just to start tracking all the Value related ones - I'll try to tackle them in v0.9 and v0.10:

• Round-trip failure: untagged enum containing Vec variant is improperly deserialized #357
• Add Value::Struct variant and preserve struct names and formatting #328
• add utility methods from_reader, from_slice, from_value similar to serde_json #255
• Nested untagged and externally tagged enums fail to deserialize #217
• to_string(from_str::<Value>("ron")) should be lossless #189
• Conversion between Value and any T: Serialize/Deserialize #140
• Current issues with Value #122
• Struct flattening not working #115
• Implemented ron::value::RawValue #407
• Serialize -> Deserialize of struct crate a SpannedError #456
• plus sign on unsigned integers #445
• RON incorrectly adds extra level of Base64 when roundtripping Bytes #436
• Rusty byte strings in RON, deprecate base64 (byte) strings #438
• PrettyPrint struct names #411
• Add number suffixes and allow more number underscores #481 (comment)
• Add full UTF-8 support in RON incl. unicode identifiers #488
• Deserializer doesn't support unicode identifiers #321