I'm presently working on obtaining an (Unarmed) Capital ship, and the grind is indeed... Painful.
That being said; the idea behind it is sound enough. Though the number of capitals that don't seem to role play, perhaps, as they should seems to imply that it's not really working. So, I'm all for reduced prices.
However; while Discovery is a Role-Play server, having to write RP likely would dissuade some people. That's neither here nor there, but flying such large ships is the reason I downloaded Discovery way back when (I know! Please don't lynch me.), and I'm not entirely sure that placing more limits on them would encourage new players.