If you've realized the benefit of being able to read music I'd strongly encourage continuing.
It helps you develop in so many ways.

It doesn't prevent you from putting your own spin on things, in fact it'll probably make you better at it.
If you can already play by ear, before you know it you'll make the relationship and reading will come quicker as you can hear the notes you read.
Like you said, there are times when it will save you time (a precious resource) so investing a little, like most things, will pay off in the long run.
It doesn't mean you have to stop playing by ear/feel, you just have another tool to pull off the bench when needed.

/5 stars: would recommend!

I do not work here, but the benefits are still awesome
Make your sound your own!