There's like 50 000 000 amateur band in my cities who play Bed Of Razors and/or Hate Me!... And both will be played at our Amateur Show (with Downfall)
I don't think it's a great thing. Because when you are one off this bodom style band, you have alot of compition with other band. But in my area, no one of this 50 000 000 bands don't have keyboardist. ha-ha.
The harpsichord part is easy if the bass play the lower note at your place (D-F-E---D-E-F-G---D-F-E---etc). If not... than good chance it's a bit hard (but not impossible).