If you have time to exchange words with a Lord, you got time to set up a rough formation before a battle.
You're busy talking to him so no time to dispatch orders xD
And somehow everyone else is not able to do it at all unless they dump focus into Tactics? Either it becomes worthless or mandatory. The whole concept of the Tactics tree is flawed and overlaps too heavily with Leadership and Steward. It's way too heavily geared toward autoresolve results which disincentives playing the actual game. Also, it's absolutely mandatory for companions leading parties as it is now. The whole thing needs to be rebuilt and rethought from the ground up or straight axed and replaced with something else entirely.
There are companions with already raised tactic skill so no need for grinding it for them Also it raises pretty quick when they lead parties and fight battles.
Another thing is tactic raises when You're giving orders while in battle so no autoresolve focus. As for perks needed for something. Nobody forces You to focus on this skill. If You prefer to go and break skulls yourself just do it. Except of not working perks I can't see any flaws in current skill system. If You see skill is useless for You don't bother raising it but after more than 100 hours in-game I can tel that all used skills are raising in quite short time. I know this system is not set for jack of all trades chars but I'm totally fine with it cause I hate this type of approach in games when You need to grind skills cause You can't live without them. Right now You can easily live without skills that seems boring to raise. And if You're already not using them You won't feel the difference if You grind them.