Things the Mavaro needs are: lock-on ergonomic grips. I like the Brooks model (see first pic shown below). Ergon also has a nice option that's less expensive than the Brooks model (see second pic shown below). I would also like to add a suspension seat-post for added riding comfort. I'm just not sure what might work as my seat height is pretty low already.
I noticed you had posted a question elsewhere about purchasing a Bosch battery at a discounted price. I don't have any experience in this category, however, I did some searching and found this vendor offering the Bosch PowerPack 500 Performance battery at $687.18.
https://www.bike-discount.de/en/shop/bosch-9674?currency=5&delivery_country=191
I hope you're not having any issues with your current battery. I think we both have the 400 and mine seems to be in great condition.
Best!
View attachment 21040
View attachment 21039