OK. Been reading all of the arguments about cost and karma and all that. I think the biggest thing being missed is, IMHO, the value of the Magic attribute between editions.
In all editions Magic is a limiter of the force of the spell you can cast and spirit you can summon.
In all editions it was used for certain astral tests and vs wards.
In older editions it was the radius for area spells. In 4th, based off force
Magic loss was the rule back then, now it's optional much harder to boot.
Also in older editions it was peripherally added to spellcasting rolls (being averaged with 2 other attributes for spell pool). Now you add the entirety of your attribute to all tests.
Magic means more in 4th ed than in earlier editions. Therefore, a power focus is more potent in 4th. Probably why they chose to increase bonding costs and change it's game effect (add directly to Magic). That, and the fact that in older editions, it was very difficult to get spells at a significant force. In 4th, it's nothing to see a force 12 spell.
Regardless, as everyone else has already posted. It is what it is now. Follow the rules as is or make your own up. Either way, peace.
