Ok When i heard that SoZ would not increase the Level cap in NWN2 I recalled Higher Ground's Legendary Levels system in NWN. it used Leto to make alterations to characters after they reached a set numver of experience points (beyond 40th) and In some instances allowed characters to Advance to 99th level. (I believe it was Trimme's X-treme LOTR that went to 99th).
My idea whic i am incapable of coding myself or I would, is to have a similar system that is GUI driven and activated by a placeable object or npc that you visit when you know you have enough xp to "level up" it will open the Gui and you will be able to progress your character gaining ability points, attack bonus and you will be able to select feats, I am not certain if caster levels above 30th would be possible but it may be possible to add a bonus to the casters DC's for spells every level beyond 30th. The Characters "legendary" levels (being levels beyond 30th) could be stored in a variable either on the players "skin" or on a small plot object that can only be deleted by a DM (or removed with a .bic editor). This item could store all the additional feats and attributes as a constant bonus for having the item, and with a Leto system could make the adjustments "real" not succumbing to enchantment caps. The Exact details on what could or could not be done and weather or not NWNX4 would be required I cannot answer However a system like this would be verry welcome by the community and if tailorable could allow "unlimited" advancement.
10 - A Masterpiece, Genuinely Groundbreaking 9 - Outstanding, a Must Have 8 - Excellent, Recommended to Anyone 7 - Very Good, Deserves a Look 6 - Good, Qualified Recommendation 5 - Fair, Solid yet Unremarkable 4 - Some Merit, Requires Improvements 3 - Poor Execution, Potential Unrealized 2 - Very Little Appeal 1 - Not Recommended to Anyone