Improvement suggestion on Updating theme

Overall I like the theme very much, it corresponds to my needs.

But I am a beginner level user (this is why I bought this theme, because the Add say it's easy to use etc). And it really is, except for one detail: the update has to be done using FTP. I don't know anything about it, so am I supposed to pay someone to update my theme every new update available, which means, almost every week?

The programmer that updated it for me last time said your documentation is very good, but it took him lots of time to update it because I had changed a few codes (such as space between lines and font size in posts. This is an improvement suggestion as well: to put line spacing options on the builder so we don't have to change it in the code. Or is it possible by adding a CSS?)

I will try to learn to update by my own, but even then, I will be considering changing theme for this one little detail, as it apparently will take lots of my time considering the amount of updates per month.

I would be very happy if in one of these updates you send one that solves this, and I know I'm not alone in this.

Thanks :)