I mained a BS/INV scrapper back in the days of Live with a "modern day Paladin" theme. He was very tough and the broadsword put up some good single target damage numbers. Great thing about Invlun is a well built scrapper can tank pretty well in a pinch, and I often tanked for the team, even in certain TFs. I am unfamiliar with changes from Live to Homecoming, but based on the fun I had with my BS/INV Paladin back in the day, I highly recommend!
I have not played since live though, so I am curious why the consensus now seems to be that Katana is better than Broadsword? IIRC they were considered equal as far as DPS back in my days on live.
Edited for typo