Here you can see a selection of Danish swords of both types alongside each other from the same period: https://www.researchgate.net/figure/Images-of-Danish-swords-...
The blade seems thick, so even with a bronze handle the sword might have been balanced well enough to be usable.
Just from the pictures it cannot be guessed whether the sword was too heavy to be easily handled by a normal human.
it looks like the pommel of a rondel dagger which is as stabby as it gets
Am I wrong? Can you really not sharpen bronze?
But other damage was limited. Bends and dents andd the like can only be repaired so often before the metal becomes brittle. Work Hardening is sort of the application of this process just to the surface/edge.
This kind of sword would not have been used like a hammer.
The wavy pattern on the bronze handle would have ensured a firm grip even with a sweaty or wet hand. I have some Japanese Tojiro kitchen knives, which have stainless steel handles with a similar pattern on the handle, and they are more comfortable than most of the knife handles made of wood or plastic, especially when used with a dirty hand.
So based on this experience, I do not believe that such a bronze handle would have been a serious disadvantage, even if it is possible that the sword was purely ceremonial.
However you have a valid point that anyone wielding a sword had to resist the shock of a successful parry with the shield done by the opponent.
For thrusting movements, I do not believe that such a bronze handle would have been worse than any other handle, because it is unlikely to have been more slippery.
Only for cutting movements you are right that a handle wrapped in leather or cords should have been better at absorbing shocks.
That said, the craftsmanship of the sword I used was nothing like the one in the TFA and it didn't have a handle cast onto the blade, nor such an intricate design. I don't know how accurate the shield were to the time period (one was leather bound, the tower shield was not) but they didn't have metal rims and shield bosses.