No experience with a re-tip here, but then Cadenza Bronze owners are pretty rare to begin with. However, I have also owned the predecessor Kontrapunkt "c", which looks to be the same as the Bronze save for 3 differences ("c" then Bronze attributes):
1. FG80 stylus instead of Replicant 100
2. Silver wire instead of gold/copper Acurum wire
3. Plastic middle piece instead of aluminum
The main difference here is the stylus, so this comparison may be relevant to your inquiry. Unfortunately I no longer have the "c" for a direct comparison, but I loved that cart. The Bronze adds a little more detail and better dynamics; the "c" was a bit warmer. Overall the Bronze sounds cleaner, i.e. going a bit in the direction towards the Jubilee/Winfeld (both of which I also owned for a time) while the "c" could be construed as more musical. Other than that, they're largely similar in character -- the Bronze is still warmer and more plump in midrange than its higher siblings, just not as much as the "c" was. Both have very good detail and bass/dynamics, but cannot stand up to the Winfeld in those categories. Honestly I might prefer the "c" to the Bronze, overall. So I think a re-tip is a very viable option -- but only if you can retain the cantilever though, which I believe is integral to this model's sonic character. On the other hand, 930 euros for a brand new Bronze from Ortofon ("repair" cost) is a pretty sweet deal too. However if the damage does not extend past the stylus, I'd probably try the re-tip.