If you can get a discussion going with the maintainer, which is not a guarantee (cant speak to libre maintainers, but I know other projects like this), then you have to convince them that your change is both valuable and reasonable for them to maintain. The latter part there is key - they are _maintain_ers. You write the code once and then run off. If you write some new UI in some fancy framework then they have to live with it forever and learn a new framework to support it. Its a big cost for them, so on smaller projects maintainers can get defensive/grumpy