Epic Spell house rule: Consequences?

[Jack Simth]

My players may be going Epic soon, and I can see several fairly simple abuses with Epic spellcasting as it's laid out, and I was wondering what people would think of the following house-rule on epic spells:

Development costs (Time, GP recources, XP) for epic spells are based on the DC before any mitigating factors are applied.

Specific questions:
1) Will this get rid of the brokenness that happens in low-epic (e.g., Leadership/Permanent Summons for lots of contributed spell slots, taking forever for a Permanent spell)?
2) Will this still permit Epic spellcasting for things that are still useful?
3) Will this nerf Epic spellcasting too much?
4) Am I just being overly paranoid?

 

[Kerrick]

I'd say just look over the spells yourself. You're the DM, and you have the power to say "No, this isn't going to fly." If you don't want huge rituals mitigating DCs down to 0, then nix them. Or you could simply set a minimum Spellcraft DC - say, 30. Or (shameless plug) you could try this system on for size - it's a really simple level-based epic spell system.