As someone who's seen bards played effectively, I have to take issue with this statement. A character who understands the role of a bard can make the bard quite an effective class. A bard isn't just a neutered sorc/rog. Bards have a lot of other abilties.
BTW, re: your contention that a sor/rog gets more skills and spells than a bard 4, that's open to debate.
No int bonus skills:
rog 1/sor3 32+6--effectively 35 since almost all rogue skills are cross-class for a sorceror
brd 4 16+12--28
Human skill comparison
rog 1/sor 3 36+9--effectively 40
brd 4--20+15--effectively 35
Human with 12 int (or nonhuman with 14 int)
rog 1/sor 3 40+12--effectively 46
brd 4--24+18--effectively 42
This, however, is somewhat misleading since the rog/sor will only be able to keep 1+ (1/2 int and human bonus) skills maxed (that takes two skill points per level since he'll be purchasing cross-classed) but the bard will be able to keep 4+int and human bonus skills maxed. Consequently, even though the rog/sor will have more skill points until level 6 or so, they will be spread out rather than concentrated. The bard will have more skill points than a rog 1/sor x multiclass after level 6 or so and will be able to concentrate them in skills he wishes to excel at.
On spells, it's actually more clear cut.
Spells Known:
Rog 1/Sor 3
5/3
Brd 4
6/3/2
Spells/Day
Rog 1/Sor 3
6/5
Brd 4
3/2/0
Since both characters will have similar charisma bonusses this is probably really:
Rog/Sor
6/6
Brd
3/3/1
The bard knows significantly more spells than the reg/sorceror and can cast higher level spells (although fewer of them per day). Since higher level spells tend to be more effective than a couple of lower level ones, and the bard knows more spells but the sorceror/rogue has a more extensive spell list, I'd say that they're about equivalent in spellcasting ability.
Of course, skills and spells (and sneak attack) are just about all that the rog/sor has going for him. The bard also gets bardic music abilities (none of which should be sneered at), bardic lore, a better base attack bonus (+3 vs +2 at the levels compared), and an average of 3 extra hit points (potentially compensated for by a toad familiar on the rog/sor's part). If the rog/sor gains more levels of rogue, he may be able to keep up in terms of skill points but will fall behind the bard in spellcasting ability. If he advances only in sorceror levels, he will be ahead of the bard in spellcasting ability but will fall dramatically behind in terms of skills saves, and other abilities.
The case against the bard isn't nearly so cut and dried as you make it out to be.
die_kluge said:
I'll grant you that playing a bard is hard. I've tried; I'm not good at it. No desire to play a monk.
--BUT-- you shouldn't have to be a good role-player to get the power out of a class. I could just as easily play a rog1/sor3 versus a brd4 and get just as much bang for my buck, and have a ton more skills and spells to boot.