Hey I have the same bow as you. I bought it Jan 2021 so I've had it for 1.5 years now. I'll give you a quick overview of how my bow evolved.
The first the I changed was the quiver. the screws the hold the quiver to the sight comes loose really easily, especially if you're out west and hiking around.
The 5 pin fixed sight isn't bad, once you get used to setting the pins and the housing its a decent sight especially if you're not going to shoot past 60 yards (assuming you set up the pins at 20, 30, 40, 50 and 60 yards). I eventually bought a new sight that slides so that I can reach out to farther distances . ( though with a 70 pound bow and 420 grain arrows you should be able to set the bottom pin at around 80 yards)
The stabilizer that comes on the bow does nothing to stabilize you're hold, Its more of a vibration dampener. This is fine and if you're not going to shoot long range (60+ yards) I wouldn't bother changing it. if anything you can take it off and you wont really notice a difference.
I would spend $20 dollars and buy a better hand sling with a metal clip instead of the plastic one that comes with the bow. The plastic clip prevents the stabilizer from ever fully locking in to the treads.
The bow is really great and a big bang for your buck. Depending on your skill you should be able to get pretty tight groups at 60 yards. See the videos and images on my insta @czdr_michael