Oni
First Post
But, that's not a cut and dried question.
First off, you're dropping a 5th level character resource on an encounter that is WAY below their weight class. Even in AD&D, fireballing kobolds was overkill by a whole pile. Why would you bother? The fighter is getting 5 attacks per round (lower than 1 HD creature - or is that a Basic/Expert rule that I'm misremembering?) and you've likely got 3 fighter types. 15 attacks per round, why would you bother?
So, sure, in AD&D, you're pretty much autokilling kobolds with a fireball. You probably should since this is about 1/2 way to max level for most campaigns. A better equivalency would be to look at a 5th level 3e spell (1/2 way to max level) and a 15th level power for 4e.
Now, all of a sudden, kobolds automatically die in every case.
The scaling between editions is different. There is no such thing as a 1:1 relationship. Fireball in 1e was the go to combat spell because you're likely not going to see anything higher than about 5th level, ever. Fireball was a fairly minor combat spell in 3e, because the campaign is presumed to go much higher level. Fireball in 4e is a low level attack spell that gets superseded fairly quickly.
Differing scales makes the discussion pretty difficult.
The problem with this is that Fireball is an absolutely quintessential D&D spell, and if it doesn't behave as one expects a D&D Fireball to behave then it going to cause a huge disconnect, and as should be more than a little obvious by now, that's going to be hugely off-putting to a goodly number of people. It's the accumulation of a litany of little things like this that make people start to cry "Not D&D!" That is of course a bit of a subjective judgement, maybe they're right, maybe they're not, but that is why that happens.