Completely agreed on all of these (the lack of search, in particular) is just atrocious. I'd also like to see:

- Improved export functionality on all platforms :: I should be able to export my chats in some readable format from any client.

- More clients :: I should be able to read my Signal messages within emacs.

- Support for non-phone-number identifiers :: I shouldn't need to purchase a new phone number in order to get another Signal account. I completely get how valuable this is in limiting certain forms of abuse, but it also limits certain forms of legitimate use (e.g. Haven).

- Better privacy for contacts :: I shouldn't be sending my contacts to Signal's servers. I don't trust Intel's secure enclave technology any more than I trust Intel's ME. There are ways to discover mutual contacts privately.