UngeheuerLich
Legend
Yes! After all, it is the DM that has to create the adventure. And there are adventures that use certain spellcasting methods and would not work with a different.I also really don't get the focus the article places on the DM. I mean, obviously the DM gets to approve classes and races and such, but should every wizard player really have to prepare a sales pitch for his preferred casting method?
Also it is a matter of balance: If you put things on the DM side, some options may be a little bit more or less powerful.
A DM can be advised to allow Wizards to use the sorcerer method if some player really does not want to play a sorcerer but likes how he casts spells. Think about it a different way: If you as a player may chose every little thing of a class, why have classes at all (and yes, creating your own class may be a module)