A agree with "Poor_Knight" and "power roleplayer"
something needs to be changed with spellcasting,
and it should be similar to combat mechanics,
I do like the idea of being able to save from an effect after a spell is cast, so that a sleep spell on a fighter does not remove them from the entire encounter
i understand that in Monte Cooks "Legends & Lore" he talks about how in early levels the fighter protects the wizard, but then in later levels the wizard becomes far more powerful and versatile than the fighter...a better overtime balanceing needs to occur and I believe that
I belive that some spells, especially powerful ones, should take more than 1 round to cast.. As at later levels a fighter can hit at most 8 enemies, with either whirlwind attack or great cleave...a wizard can kill far more with fireball, stinking cloud, weird, circle of death, just to name a few..
and delaying casting time of these powerful spells would allow time for dispelling challenges or breaking concentration..
It takes more than 3 seconds to call down a rain of meteors from the sky or call a balor from hell