That's kind of the point of my post. In theory, a tactics fighter is a great addition to a group. In practice, most take 5 toughness feats instead, because of the lack of tactical options in epics.
Not that having a moderate amount of hp a good tank makes; without the heal amp to support it (or AC, but not going into that here) you effectively make a sp sponge. Personally I would prefer to make my non-tank fighter with only one toughness and loads of tactical options, so that groups really believe me when I say I'm not built to tank. (Plus I actually have an AC tank, and really, you have to give up so much to get there.)
The issue boils down to epics not supporting much of the rest of the game that is fun/etc. I feel your pain with the lack of tripping in epics. I've tried just about everything to get my horc acrobat to imp trip anything in an epic. I think I have tripped one mob once in an amrath quest. On Casual...
But in all seriousness, maybe the revamp of the Sential epics and the addition of 15trip to the armors will allow it to work in an epic once in a while.
If the dev's see that non casting tactics can work in an epic under the right situation, we may be presented with more options to use them. But right now, a trip removes something from the equation; a hold works just as well. The only thing that stuns do is a dps bonus for helpless to the rest of the party, which is about the only time that a personal dps loss from changing an offhand might be outweighed by the gain in group dps.