Thanks for the comments all. I was aware of the three effects that royal road had but, I had miss-understood what they meant. With the above explanations I now understand the skill more so thanks for that.

For Esuna, well thanks for enlightening me as to why some healers don't use it. However I couldn't not have it equipped at all times because there is a reason. It really bugs me to see someone with a debuff when I know as a healer I can remove this, yet saying that, I will always put healing first as a priority. Say for instance the tank has several poison debuffs, I will make sure the tank is near to full health before I start removing debuffs. I don't know whether the debuffs bugging me is an OCD thing or not but it's just the way I am, and if this makes me an inexperienced healer then so be it. It's all down to personal preference, and I prefer to have Esuna equipped than not