[Bishop Edward]

1. Make it require a few more levels in Bard or Sorc. (Hell or even wizards. Nothing is stopping a PC from having dragon's blood in them generations removed. It may even make people play more casters on the server.)

Nothing /stops/ a PC from having dragon's blood in them generations removed, BUT for Bards and Sorcs the draconic blood /is/ THE source of their power (classically)... thus I am completely against opening it up for any other classes... but you make a good point about how people always 'use' the class for something other than to advance their arcane bloodline...

That said, I'm in the camp that believes we should stay as close to PnP as possible, so my solution would be to try for something toward the PnP implementation: "Dragon disciples gain bonus spells as they gain levels in this prestige class, as if from having a high ability score," - which doesn't give them 'progression' but rather raises their /effective/ Charisma. The easiest way to achieve this in NWN would probably be +1 charisma at the levels where they gain bonus spells from effective charisma: 1, 2, 4, 5, 6, 8, 9 (not on 3, 7, or 10: where they get +2 anyway from Apotheosis)...

+7/9 charisma alone should encourage players to take more spellcasting levels as such a high charisma would be even more effective that way, without sacrificing their PnP integrity by actually giving them caster 'progression' (so that they still have to actually take those bard/sorc levels, and not, say, fighter levels) or lowering their physical presence (which should balance out when they aren't taking those 'offending' melee-class levels), a sorc 10/rdd 10 is still quite impressive, even though they only cast 5th lvl spells, they cast a heck of a lot of them with an exceedingly high DC... (30-32 Cha total not including items, which would give another 12 for 42-44, depending on if they start with 16-18).