Do you think it they are any benefits to practicing with less experienced players in contrast with practicing with better/ equal players? just wanna here other opinions :3
Not in the long run. Maybe fun for a few games if you want to practice outrageous shots without being under any pressure, but that's about it.
You can practice backhands, movement related things like split-stepping and correct number of steps from middle to each position. Shot accuracy maybe. Basically you're practice basics when with weak players. I practiced my backhand clears a ton this summer while training my newb girlfriend. And yes, a couple of tricky things like hitting with the forehand face of the racket on the backhand side (not round-the-heads) and in between the legs (though between the legs is hard if you're not receiving smashes to that area).
Stressing again, practice the basics. Also it's a good opportunity to just practice your timing and contacting the shuttle in the sweet spot since you'll have more time to get to the shuttle. It's sometimes nice having a slower pace and hitting the sweet spot with good technique as a warm up. You get the feel for the shuttle. Then once you're done you can go play others who are more on your level.