Healing is not boring at all, but that depends on what you like and on the group you are healing, of course.
And yes you can take your saber strikes off your hotbars. You will never, ever use them.
I've healed up to Athiss. It's alright but a little mundane, but I think that has more to do with the fact I don't have all my tools yet so it feels kinda boring when I only have deliverance, benevolence, and my bubble.
I'll probably stick to the TK tree up till the 20s or so just cuz spec doesn't really start to affect your playstyle till then.