Trying for specific builds is a lot of fun, but remembering all the mods you want to take can be a pain. My suggestion is something that lets you create 'build outlines' from the main menu and select one at the start of a run. Once you start a run, the outline would be accessible through the pause menu (like the list of supermods). These outlines are essentially a list of mods that could be separated into tiers (ex. early/mid/late, important/core, etc.). I think this would be a very nice QoL feature.
(not sure if this counts as overlap but it is somewhat related to: https://novadrift.featureupvote.com/suggestions/116011/autoupgrade-option-to-automatically-apply-upgrades-according-to-a-previous-run)