Oh, I don't think the EK tree offers enough hit/damage options. I just don't think that making cha/int the controlling stat for those is the solution. Enhancement lines to boost both, something to increase BAB, spellsword being affected by spellpower would all be better options.
Already answered multiple times by myself and others. Shifting a melee stat on a melee toon (like dex instead of str on a rogue) is not even close to equivalent damage possible on a caster. And you cannot shift the function on any other casters. Clerics can't use wis as their melee stat. FVS can't use wis or cha as their melee stat. Druids can't use wis as their melee stat. Why should sorcs and wizards, both arguably more powerful in casting than any of the other casting classes, be able to consolidate their casting and melee stats? it makes zero sense.