Kobu said:
Those are good reasons.
Some of my reasons for discouraging table talk:
1) Speed of the game
2) Your characters are not omniscient in regards to the battlefield
3) It tends to take players out of character
4) As DM, I don't optimize enemy tactics--they make mistakes just like the PCs do
My impression of the warlord is that it will slow things down to the point where it will negate the time saving benefits of set powers, the character will behave as though he is omniscient, a lot of things he does will be too complex to run in character, and I will need to respond to his tactics in a like way to keep the encounters balanced.
I won't act as if your concerns aren't valid (they are), but I have a good reason why I allow table talk.
I'm not my PC.
My PC is a warrior (or wizard, or rogue, etc) who lives and dies by the sword. He has trained against countless combatants, faced immeasurable foes, and has worked with his allies for long enough that during those long "boring times", they have discussed tactics and formed a certain camaraderie that lets him know that "Ablada Kabamla" is the opening words to fireball, the rogue uses spring attack, there is no point to flanking a vampire, and and you kill the evil priest FIRST.
However, I am a substitute teacher in the Midwest who plays D&D every other weekend. I'm lucky if I remember my fellow PC's NAMES, much less their individual combat mannerisms. I've never used a sword in my life, and I'm fairly certain I'd hurt myself if I tried. I've never seen combat. I am also not privy to the vast assortment of sights, sounds, smells, terrain changes, and other input I would if I was actually standing there (beyond what my DM describes in an opening paragraph probably read once and 10 minutes ago). ERGO, I am wholly unqualified to make sound tactical decisions my PC would make as a matter of course and survival.
Therefore, I use table talk to quickly convey information that others might know about my PC to give them additional information that allows them to make decisions based on the fact the PC is friends and comrades with 3 other dudes and they know each other the same way (or better) than I know the people PLAYING them.
It just makes up for the time spent NOT playing D&D...