Faster Spellcasting, Developing Simple Action Spellcasting (SR4) Options

[Wombat]

I was thinking about Metamagic and came upon the idea of a Simple Action spell with the following points:

• The Metamagic would be either part of the cost of Initiating or 15 Karma.
• The Metamagic would allow the caster to cut some of the excess out of a spell's formula.
• The caster must know the original spell.
• Each shortened spell would have to be re-learned with a cost of 1 Karma.
• 2's count towards glitches on the Spellcasting Test.
• Additional Karma may be spent when re-learning the spell, to reduce the number of 2's that count towards glitches.

What do you guys think?