I would love this too, but it'll never be part of the default game; this sounds like more of a feature request for 2K Tools.
That said, just FYI, I created a template for greatly expediting the from-spreadsheet data-transferring process for Attributes and Tendencies (the two biggest pains in the butt) ->
viewtopic.php?f=272&t=113686&p=2060874#p2060874There is also a tutorial video in my follow-up post in that same thread.
It's still a somewhat tedious process to do for an entire roster, since everything is done player-by-player, but it's exponentially quicker than doing EVERYTHING by hand. Back when 2K22 first came out, I ported over spreadsheet-based Tendencies from CelticLG's previous Attention To Detail roster in like a day, when it would take literally weeks to do so 100% manually.