Sweet guitar, congrats on your first Gibson (hopefully not last)
I remember having the same experience with the Classic 57 in neck and Classic 57 Plus in bridge of my 2017 LP Classic Goldtop.
They kinda sounded good - much better than burstbuckers , but way too woofy with a very weird and loose bass spike. Replaced them with a pair of Duncan 59 Blues Set, and it sings like a bird.
Luckily the 57 Classic are expensive and easy to sell second hand. They almost funded a brand new Seymour Ducan 59 set.
Would be nice to see a photo with the new humbuckers installed. Raw nickel covers are always a good choise.