I find the behavior of moving the cursor when typing a closing pair ontop op a closing pair rather than adding another one very annoying and almost never what i actually want.
Not being able to add an extra parenthesis in a bunch of closing parentheses without moving all the way through them always catches me off guard.
vscode has a setting called "autoClosingOvertype" which allows you to change this behavior and I propose helix implement something similar.

An example of me pressing "((((()))))" and not getting any closing parens: