I have no clue how you can consider Kulak a "complete beast" or 2nd+7th a "bargain price".
He's a 3rd pair D that went for 3rd pair premium price.
TOI/GP since he was traded to EDM:
2021-2022: 6th
2022-2023: 6th (5th if you don't count Ekholm 21 games)
2023-2024: 7th (6th if you don't count Stetcher 7 games)
2024-2025: 4th
His competition this year was Emberson (claimed from SJ as a depth D), Stecher (who's been around the league as a depth D), Dermott (who got claimed then waived after a few games) and Joshua Brown (who is an AHL/NHL tweener).
This is similar to when EDM valued Kassian because they couldn't get anyone else to play the role.